Download Biophysics_1

Department of medical physics diagnostic and treatment equipment
Specialty: “medicine”, “dentistry”, “pharmacy”
Module 1. Principles of functioning of biomechanical, electromagnetic, and optical medical equipment.
Voice methods of diagnostics this :
A. auscultation , galvanization, percussion , audiometry.
B. percussion , phonocardiograph, audiometry, auscultation.
C. phonocardiograph, galvanization, percussion, audiometry.
D. Audiometry, auscultation , galvanization, phonocardiograph.
E. Galvanization, percussion, audiometry, auscultation.
ANSWER: B
In how many times length of body will be multiplied during deformation of wricked, if relative lengthening of ?
= 48
A. 48
B. 49
C. 50
D. 51
E. 52
ANSWER: B
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 1,17
A. 0,06
B. 0,07
C. 0,08
D. 0,09
E. 0,001
ANSWER: D
In how many times length of body will be multiplied during deformation of wricked, if relative lengthening of ?
= 47
A. 47
B. 48
C. 49
D. 50
E. 51
ANSWER: B
Find amplitude of vibrations, if they are described by equation Х = 0,04 cos (рt+р/3)
A. 0,01
B. 0,02
C. 0,03
D. 0,04
E. 0,05
ANSWER: D
audiogram is named:
A. Graph which shows the loss to the ear in decibels depending on frequency of sound.
B. Graph which represents the threshold of the pain feeling at different frequencies.
C. Graph which shows dependence to the threshold of the auditory feeling from intensity of sound.
D. Graph which represents the loss of hearing depending on intensity of sound.
E. Graph which shows dependence to the threshold of the pain feeling from intensity of sound.
ANSWER: A
Formulate the Hooke’s law for deformation wricked-compression through tension and relative deformation.
A. Normaltension is straight proportional to the module of force of resiliency.
B. Normal tension is straight proportional to relative deformation.
C. Normaltension is inversely proportional to relative deformation.
D. Normal tension is straight proportional to initial length of standard.
E. Tangent tension is straight proportional to relative deformation.
ANSWER: B
What directions are the vibrations in a longitudinal wave?
A. Half to the period one-way, half of period in other.
B. At the same time in two directions.
C. In all directions.
D. Only athwart to direction of distribution of wave.
E. Only to direction of distribution of wave.
ANSWER: E
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 9,1
A. 0,6
B. 0,7
C. 0,8
D. 0,9
E. 1
ANSWER: B
In how many times length of body will be multiplied during deformation of wricked, if relative lengthening of ?
=6
A. 7
B. 8
C. 9
D. 10
E. 11
ANSWER: A
Threshold of audibility of man .... .
A. always even 10 watt-meter in minus second degrees
B. straight to the proportional loudness sound
C. does not depend on frequency
D. depends on frequency
E. 10 micromicrowatt-meter is always evened in minus second degrees
ANSWER: B
Find amplitude of vibrations, if they are described by equation Х = 0,02 cos (рt+р/3)
A. 0,01
B. 0,02
C. 0,03
D. 0,04
E. 0,05
ANSWER: B
The law of Weber-Fehner can be formulated so:
A. Feeling of irritation straight irritation proportional to force.
B. The volume of sound is proportional intensities of sound.
C. The level of volume is proportional to force of irritation.
D. A volume is proportional to the level of intensity.
E. The level of volume is proportional to the level of intensity.
ANSWER: E
Days are the period of rotation ... .
A. Earth round a Sun
B. Pole-star round a Sun
C. Month circumterrestrial
D. Earths about the axis
E. Suns circumterrestrial
ANSWER: D
Formulate the Hooke’s law for deformation wricked-compression through the module of force of resiliency and
absolute lengthening.
A. Modul forces of resiliency straight proportional to the absolute lengthening.
B. The module of force of resiliency is straight proportional to initial length of standard.
C. Modul forces of resiliency back proportional to the absolute lengthening.
D. The module of force of resiliency is straight proportional tension.
E. The module of force of resiliency is straight proportional to the relative lengthening.
ANSWER: A
Frequency of the sound-wave, reflected from an object which approaches to the immobile source of sound, will
appear ..... .
A. regenerate in four components
B. infinitesimal
C. even to frequency of wave which emanates by the source
D. less frequency of wave which emanates by the source
E. more frequency of wave which emanates by a source
ANSWER: B
To find the relative lengthening of skin by Hooke's law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 0,065
A. 0,002
B. 0,003
C. 0,004
D. 0,005
E. 0,006
ANSWER: D
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 10,4
A. 0,6
B. 0,7
C. 0,8
D. 0,9
E. 1
ANSWER: C
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 11,7
A. 0,6
B. 0,7
C. 0,8
D. 0,9
E. 1
ANSWER: D
To find the initial phase of vibrations, if they are described by equation x = 0,3 cos (р/3t + р/7)
A. р/3
B. р/4
C. р/5
D. р/6
E. р/7
ANSWER: E
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 1,3 kPa.
A. 0,1
B. 0,2
C. 0,3
D. 0,4
E. 0,5
ANSWER: A
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 0,078
A. 0,002
B. 0,003
C. 0,004
D. 0,005
E. 0,006
ANSWER: E
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 0,39
A. 0,01
B. 0,02
C. 0,03
D. 0,04
E. 0,05
ANSWER: C
Volume of standard during deformation of wricked............ .
A. can diminish or remain without the change
B. remains without the change
C. can only diminish
D. can be increased or be remained without change
E. can be only increased
ANSWER: D
Find cyclic frequency of vibrations, if they are described by equation Х = 0,05 cos (3рt+р/3)
A. р
B. 2р
C. 3р
D. 4р
E. 5р
ANSWER: C
Find amplitude of vibrations, if they are described by equation Х = 0,01 cos (рt+р/3)
A. 0,01
B. 0,02
C. 0,03
D. 0,04
E. 0,05
ANSWER: A
Find cyclic frequency of vibrations, if they are described by equation
A. р
B. 2р
C. 3р
D. 4р
E. 5р
ANSWER: E
Х = 0,05 cos (5рt+р/3)
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 0,52
A. 0,01
B. 0,02
C. 0,03
D. 0,04
E. 0,05
ANSWER: D
To find the relative lengthening of skin Hooke's law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 0,026
A. 0,002
B. 0,003
C. 0,004
D. 0,005
E. 0,006
ANSWER: A
To find the relative lengthening of skin Hooke’s law, if module of resiliency of skin of Е = 13 kPa, and the
tension enclosed to ? = 1,04
A. 0,06
B. 0,07
C. 0,08
D. 0,09
E. 0,001
ANSWER: C
A flow of electric charge through a medium is called …
A. electric current
B. current intensity
C. current density
D. current source
E. electromotive force
ANSWER: A
The magnitude of an electric current as measured by the quantity of electricity crossing a specified area of
equipotential surface per unit time is called …
A. electric current
B. current intensity
C. current density
D. current source
E. electromotive force
ANSWER: B
The practical unit of current intensity is …
A. Ampere (A)
B. Volt (V)
C. Watt (W)
D. Ohm
E. Coulomb (C)
ANSWER: A
The amount of electric current passing through a cross-sectional area (perpendicular to the direction of current)
of a conductor in a given unit of time is called …
A. electric current
B. current intensity
C. current density
D. current source
E. impedance
ANSWER: C
Current density is commonly measured in:
A. Ampere (A)
B. Coulomb/second
C. Ampere/meter?
D. Ohm
E. Ohm/meter
ANSWER: C
Electric current can be defined as:
A. a flow of electric charge through a medium
B. the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of
equipotential surface per unit time
C. the amount of electric current passing through a cross-sectional area (perpendicular to the direction of
current) of a conductor in a given unit of time
D. the ratio of the work done to the charge q in moving the charge between two points in an electric field.
E. the inverse of resistivity
ANSWER: A
Current intensity is defined as:
A. a flow of electric charge through a medium
B. the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of
equipotential surface per unit time
C. the amount of electric current passing through a cross-sectional area (perpendicular to the direction of
current) of a conductor in a given unit of time
D. the ratio of the work done to the charge q in moving the charge between two points in an electric field.
E. the inverse of resistivity
ANSWER: B
… - is a scalar value measured in 1 Ampere (A)=1 Coulomb (C)/second (s).
A. electric current
B. current intensity
C. current density
D. current source
E. electromotive force
ANSWER: B
Current density can be defined as:
A. a flow of electric charge through a medium
B. the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of
equipotential surface per unit time
C. the amount of electric current passing through a cross-sectional area (perpendicular to the direction of
current) of a conductor in a given unit of time
D. the ratio of the work done to the charge, q, in moving the charge between two points in an electric field
E. the inverse of resistivity
ANSWER: C
Electromotive force is …
A. the inverse of resistivity
B. the magnitude of an electric current as measured by the quantity of electricity crossing a specified area of
equipotential surface per unit time
C. a flow of electric charge through a medium
D. the amount of electric current passing through a cross-sectional area (perpendicular to the direction of
current) of a conductor in a given unit of time
E. determined by the ratio of the work done to the charge, q, in moving the charge between two points in an
electric field
ANSWER: E
… is determined by the ratio of the work done to the charge q, in moving the charge between two points in an
electric field.
A. electric current
B. current intensity
C. current density
D. work done by external forces
E. electromotive force
ANSWER: E
The potential difference between two points — or the difference in electric potential energy per unit charge
between two points is called …
A. electric current
B. current intensity
C. current source
D. work done be external forces
E. voltage
ANSWER: E
?Analytical preparative electrophoresis of globular albumens
A. inelectrophotographic cell
B. inelectrophotographic cell
C. inelectrophotographic cell
D. electrophotographic mobility electrophotographic
E. mobilityare different
ANSWER: E
At application of physical electro-therapy procedure ULTRA HIGH FREQUENCY an operating factor will be
......... .
A. closeness of stream of eaten up power of hertzian waves
B. electric current of conductivity
C. current of displacement in the vacuum
D. magnetic field ULTRA HIGH FREQUENCY range
E. electric field ULTRA HIGH FREQUENCY range
ANSWER: E
At application of physical electro-therapy procedure are inductothermy an operating factor will
A. electric field ULTRA HIGH FREQUENCY range
B. current of displacement in a vacuum
C. closeness of stream of eaten up power of hertzian waves
D. magnetic field ULTRA HIGH FREQUENCY or ULTRA HIGH FREQUENCY range
E. is an electric current
ANSWER: D
At application of physical electro-therapy procedure - Cm wave of therapy an operating factor
A. closeness of stream of eaten up power of hertzian waves
B. magnetic field ULTRA HIGH FREQUENCY or ULTRA HIGH FREQUENCY range
C. electric current of conductivity
D. current of displacement in a vacuum
E. closeness of stream of eaten up power of hertzian waves
ANSWER: E
At application of physical electro-therapy procedure - Dm-wave of therapy an operating factor
A. electric field ULTRA HIGH FREQUENCY range
B. current of displacement in a vacuum
C. is an electric current of conductivity
D. magnetic field ULTRA HIGH FREQUENCY or ULTRA HIGH FREQUENCY range
E. a closeness of stream of eaten up power of hertzian waves
ANSWER: E
At flowing of direct electric current of conductivity in a homogeneous explorer closeness of current ........... .
A. it will be less than in points, belongings a section with a less area
B. does not depend on the area of transversal section of explorer
C. does not depend on strength of current, passing on an explorer
D. depends only on strength of current, passing on an explorer
E. it will be anymore in points, belongings a section with a less area
ANSWER: E
At flowing of direct electric current of conductivity in a homogeneous explorer tension of the stationary field
......... .
A. depends only on strength of current, passing on an explorer
B. it will be less than in points, belongings a section with a less area
C. does not depend on the area of transversal section of explorer
D. does not depend on strength of current, passing on an explorer
E. it will be anymore in points, belongings a section with a less area
ANSWER: E
Closeness of direct current of conductivity is in a homogeneous explorer .......... .
A. does not depend on strength of current, passing on an explorer
B. depends only on strength of current, passing on an explorer
C. straight proportional the area of transversal section of explorer
D. does not depend on the area of transversal section of explorer
E. back proportional the area of transversal section of explorer
ANSWER: E
Conductivity of water solution of electrolyte depends on ........
A. only from the concentration of cations
B. only from the concentration of anions
C. only from mobility and charge of ions
D. only from a concentration and charge of ions
E. from a concentration, mobility and electric charge of ions
ANSWER: E
During registration of pressure of blood in the cavities of heart can be utillized a capacity sensor. He behaves to
the devices of output of information, general name of which ........ .
A. electrodes
B. sensors-transformers of generator type
C. are power sensors-transformers
D. Bio
E. sensors-transformers of parametric type
ANSWER: E
Elasticity of bloods vessels has the following electric equivalent:
A. electric potential;
B. electric resistance;
C. inductance
D. electric capacity;
E. electric current.
ANSWER: D
Electric impedance - it ...........
A. only reactance
B. only inductive resistance
C. complete resistance an electric chain to the direct current
D. only active resistance
E. complete resistance an electric chain to the alternating current
ANSWER: E
Elektroforetik mobility of ions, ensuing electrolytic dissociation in water solutions of electrolytes, ......... .
A. and at cations and at anions equal to the zero
B. always identical at cations and anions
C. at anions equal to the zero, cations have a more zero
D. at cations equal to the zero, anions have a more zero
E. it can be different at cations and anions
ANSWER: E
Find communication between the module of a gradient of speed and speed of shift in the elementary experience
of Newton with a viscous liquid.
A. Module of a gradient of speed is equal to one third of speed of shift.
B. Module of a gradient of speed is equal to the one fourth speed of shift.
C. Module of a gradient of speed is equal to speed of shift.
D. Module of a gradient of speed is not connected in any way with speed of shift.
E. Module of a gradient of speed is equal to three speeds of shift.
ANSWER: E
For an electric chart, containing the consistently united condenser and resistance, at aspiring of frequency of
alternating current to the zero the value of electric impedance is approached to to ...... .
A. to the value of active resistance
B. to thenegative value
C. wave resistance of vacuum 377 Ohm
D. to the zero
E. endlessnesses
ANSWER: E
For an electric chart, containing the consistently united condenser and resistance, at aspiring of frequency of
alternating current to endlessness the value of impedance is approached to to ........ .
A. to wave resistance of vacuum 37 Ohm
B. to the negative value
C. endlessnesses
D. to the zero
E. to the value of active resistance
ANSWER: E
For an electric chart, containing the parallel united condenser and resistance, at aspiring of frequency of
alternating current to the zero the value of electric impedance is approached to to ........
A. to the negative value
B. to wave resistance of vacuum 377 Ohm
C. to the zero
D. endlessnesses
E. to the value of active resistance
ANSWER: E
For an electric chart, containing the parallel united condenser and resistance, at aspiring of frequency of
alternating current to endlessness the value of impedance is approached to to ........
A. to wave resistance of vacuum 377 Ohm
B. to the negative value
C. endlessnesses
D. to the value of active resistance
E. to the zero
ANSWER: E
On a mirror surface the ray of light angle of 30 degrees. A corner between light angle and reflected rays is equal
.
A. to 90 degrees
B. to 30 degrees
C. to 45 degrees
D. to 15 degrees
E. to 60 degrees
ANSWER: E
The ray of light, light angle on the surface of water, is refracted. The refraction of light ray is explained that: .
A. the photons of light bunch push off the molecules of water
B. the photons of light bunch are attracted the molecules of water
C. speed of photons of light bunch in water less speed of photons in mid air
D. velocity of light in water his more speed in mid air
E. velocity of light in water his less speed in mid air
ANSWER: E
On a collecting lens parallell the ray of light angle an optical ax. After passing through a lens ray .
A. will cross an optical ax from the side of space of objects
B. will get through the optical center of lens
C. will pass parallell to the optical ax
D. will cross an optical ax
E. will deviate from an optical ax
ANSWER: D
At the refraction of beam of white light in a glass prism most strongly from primary direction will deviate .
A. orange ray
B. green ray
C. yellow ray
D. red ray
E. violet ray
ANSWER: E
Temperature of body is growing in two times. In what time radiation of body become large?
A. in 70 time.
B. in 34 time.
C. in 4 time.
D. in 26 time.
E. in 16 time.
ANSWER: E
Temperature of black body is growing in two times. How will change wavelength, which have maximum
spectral density radiant emittance?
A. No change
B. growing in two times
C. decrease in tree time
D. growing in tree times
E. decrease in two time
ANSWER: E
In time sunset horizon become red color. This possible explain from law
A. Wien displacement law
B. Stephan – Boltzmann law
C. Faraday
D. Malus
E. Rayleigh
ANSWER: E
Wavelength of visible light is
A. 380- 600 nm
B. 500- 800 nm
C. 400- 800 nm
D. 200- 760 nm
E. 380- 760 nm
ANSWER: E
Define charge, which pass continue galvanization throw body t= 1 s, current strength І=10 mА.
A. 110 mC
B. 120 mC
C. 130 mC
D. 140 mC
E. 100 mC
ANSWER: E
In a flat mirror turns out .
A. actual inverted image of object
B. actual diminished image of object
C. actual image of object
D. virtual image of object
E. virtual megascopic image of object
ANSWER: D
An object is in the distance equal to the half of focal distance from a collecting lens. Thus there will be an
image ... .
A. inverted, diminished, imaginary
B. direct, diminished, imaginary
C. direct, megascopic, actual
D. inverted, megascopic, imaginary
E. direct, megascopic, imaginary
ANSWER: E
At a supervision in a microscope two the close located points on preparation becomes hardness to distinguish
because of ....... .
A. refractions
B. polarizations
C. of dispersion
D. diffractions
E. effect of Doplera
ANSWER: D
The narrow parallel beam of white light angle normally on a diffraction grate. After passing through a grate a
ray will most strongly deviate from primary direction .
A. green color
B. violet color
C. of dark blue color
D. red color
E. orange color
ANSWER: D
There is an index of refraction at normal dispersion of light ...... .
A. increased with the increase of wave-length light
B. does not depend on a wave-length light
C. diminishes with the increase of wave-length light
D. decreases with the increase of frequency of light
E. does not depend on frequency of light
ANSWER: C
That ''clarify'' optics of eyepiece of microscope his frontal lens .... .
A. wash izopropil ether
B. wash water
C. wash an alcohol
D. cover the layer of dielectric with the large index of refraction
E. cover the layer of dielectric with the less index of refraction
ANSWER: E
Dispersion of light is name the aggregate of the phenomena, conditioned dependence ......... .
A. index of refraction of matter from amplitude of light wave
B. index of refraction of matter from his closeness
C. of intensity of light from length of light wave
D. index of refraction of matter from length of light wave
E. index of refraction of matter from the phase of light wave
ANSWER: D
Absolute index of refraction of environment ........ .
A. does not depend on a wave-length light
B. always less zero
C. always more unit
D. always less unit
E. always anymore or equal to unit
ANSWER: E
Absolute index of refraction of environment ........ .
A. determined in relation to the index of refraction of ice
B. determined in relation to the index of refraction of air
C. is determined in relation to the index of refraction of water
D. equal to the relation of speed of photon in a vacuum to speed of photon in a matter
E. equal to the relation of velocity of light in a vacuum to velocity of light in substance.
ANSWER: E
The corner of reflection is counted off from ......... .
A. light angle ray to the interphase environments
B. perpendicular to the interphase environments
C. of the refracted ray to the interphase environments
D. backbeam
E. interphases environments
ANSWER: B
The phenomenon of complete internal reflection is observed, when light passes ..... .
A. from air in water
B. from air in glass
C. from a vacuum in glass
D. from an optically less dense environment in optically more dense
E. from optically more dense environment in optically less dense
ANSWER: E
Optically more dense environment ...... .
A. has a less index of refraction
B. has a high-slay
C. has a greater index of refraction
D. has a greater asorptance
E. large absorb has
ANSWER: C
Optical difference of motion of rays of light ...... .
A. equal to work of geometrical difference of motion on the index of refraction
B. to the sum of geometrical differences of motion
C. is always equal to the geometrical difference of motion
D. always less geometrical difference of motion
E. does not depend on the geometrical difference of motion
ANSWER: A
The beam of light from the real source can not be done infinitely narrow from the phenomenon .......
A. interferences
B. diffractions
C. of polarization
D. absorptions
E. dispersions
ANSWER: B
At causing of clarifying coverage on optical details pick up a dielectric, index of refraction of which ...... .
A. equal to Square root from the index of refraction of glass of detail
B. equal to the index of refraction of air
C. is equal to the index of refraction of glass
D. equal to the square of index of refraction of glass
E. equal to the index of refraction of air
ANSWER: A
Optical force of collecting lens is equal to 5 diopters. you will define focal distance of lens.
A. 0,2 m
B. 0,5 m
C. -2,0 m
D. 2,5 m
E. 0,2 m
ANSWER: E
The absolute index of refraction of one matter is equal 1,5, other 1,2. you will define the relative index of
refraction of the first matter in relation to second one.
A. 1,25
B. 4/5
C. 3/5
D. 1,5
E. 1,2
ANSWER: A
The absolute index of refraction of matter is equal 1,5. you will define the index of refraction of matter
relatively vacuum.
A. 1,5
B. 0
C. 1,25
D. 3/4
E. 4/3
ANSWER: A
The cone of parallel rays got on a flat mirror. After a reflection from a mirror ...... .
A. a bunch going to one point before a mirror
B. a bunch was reflected parallell to the perpendicular to the surface of mirror
C. a bunch going to one point after a mirror
D. the cone of parallel rays turned out
E. a bunch passed for a mirror without violation of parallelness
ANSWER: D
If parallel rays after a refraction in a lens meet, indeed intersecting in some point, lying for other side of lens, a
lens is named .... .
A. dispersive
B. concave
C. protuberant
D. negative
E. collecting
ANSWER: E
If parallel rays after a refraction in a lens become going away, a lens is named .... .
A. dispersive
B. positive
C. cylindrical
D. protuberant
E. concave
ANSWER: A
What option does the absolute black body correspond to?
A. the absorption coefficient of the body is equal to 1 for all frequencies and temperatures;
B. body radiation Me = 0;
C. body radiation for all wavelengths Me = 1;
D. scattering coefficient t = 1;
E. Me/a = const.
ANSWER: A
SI derived unit of irradiance is:
A. Watt/m2;
B. candela;
C. lux;
D. Joule;
E. Watt.
ANSWER: A
SI derived unit of spectral density of radiant emittance is:
A. Watt /m3;
B. lux;
C. Joule /m2;
D. Joule;
E. candela.
ANSWER: A
What law can directly calculate the temperature of the heated body?
A. the Planck law;
B. the Rayleigh–Jeans law;
C. Wien's displacement law;
D. Kirchhoff's circuit laws;
E. The Stefan–Boltzmann law.
ANSWER: E
A thermographic camera or infrared camera is:
A. a method of thermal analysis;
B. a device that forms an image using infrared radiation, similar to a common camera that forms an image
using visible light;
C. temperature sensors;
D. a device, which supports stable temperature;
E. devices for fiber images of internal organs.
ANSWER: B
Thermometry can be defined as:
A. increased sensitivity to heat or cold;
B. the conversion of thermal energy into electrical;
C. the measurement of temperature;
D. image registration method of temperature changes;
E. reduced sensitivity to heat or cold.
ANSWER: C
A thermograph can be defined as:
A. registration of thermal radiation of the skin on a thermographic camera;
B. the conversion of thermal energy into electrical;
C. increased sensitivity to heat or cold;
D. image registration method of temperature changes;
E. reduced sensitivity to heat or cold.
ANSWER: A
Thermography can be defined as:
A. the conversion of thermal energy into electrical;
B. the transfer of thermal energy across a well-defined boundary around a thermodynamic system;
C. registration of thermal radiation of the skin on a thermographic camera;
D. interchange of energy in the form of heat between an organism and its environment;
E. a technology that creates and analyzes images by detecting the heat radiating from an object.
ANSWER: E
Thermal direction-finding can be defined as:
A. the transfer of thermal energy across a well-defined boundary around a thermodynamic system;
B. interchange of energy in the form of heat between an organism and its environment;
C. registration of thermal radiation of the skin on a thermographic camera;
D. the method where the direction of an object is determined on the basis of the object’s own thermal
radiation;
E. a technology that creates and analyzes images by detecting the heat radiating from an object.
ANSWER: D
What property can be used to get polarized light?
A. magnetostriction;
B. electrostriction;
C. photoeffect;
D. light diffraction;
E. double refraction.
ANSWER: E