Light and Optics - Mayfield City Schools
... • Step 1: Draw a light ray passing through the center of the lens. • Step 2: Draw a light ray that starts parallel to the axis and bends at the lens to pass through the far focal point. • Step 3: Draw a light ray passing through the ...
... • Step 1: Draw a light ray passing through the center of the lens. • Step 2: Draw a light ray that starts parallel to the axis and bends at the lens to pass through the far focal point. • Step 3: Draw a light ray passing through the ...
Light Tasks
... New experiences that don’t fit the patterns they are familiar with o Refraction: Spear fishing demonstration, coin in cup o Force and motion: Falling objects, weight in a vacuum, cart with constant force o Buoyancy: Alka-Seltzer demonstration o Color, reflection, or intensity: ???? New patterns ...
... New experiences that don’t fit the patterns they are familiar with o Refraction: Spear fishing demonstration, coin in cup o Force and motion: Falling objects, weight in a vacuum, cart with constant force o Buoyancy: Alka-Seltzer demonstration o Color, reflection, or intensity: ???? New patterns ...
Light Rays
... Light from the sky is gradually refracted more towards the horizontal as the air near the ground has a lower refractive index (optically less dense). Total internal reflection takes place when it meets a layer of air at an angle greater than the critical angle. The image of the sky is then formed on ...
... Light from the sky is gradually refracted more towards the horizontal as the air near the ground has a lower refractive index (optically less dense). Total internal reflection takes place when it meets a layer of air at an angle greater than the critical angle. The image of the sky is then formed on ...
CHAPTER 3: Light and Telescopes
... •why different types of telescopes are used for different types of research •what new generations of land-based and space-based high-technology telescopes being developed can do •how astronomers use the entire spectrum of electromagnetic radiation to observe the stars and other astronomical events • ...
... •why different types of telescopes are used for different types of research •what new generations of land-based and space-based high-technology telescopes being developed can do •how astronomers use the entire spectrum of electromagnetic radiation to observe the stars and other astronomical events • ...
Refraction
... Total internal reflection and optical fibres Light enters the fibre at an angle greater than the critical angle. Total internal reflection occurs and the ray is reflected in such a way as to ensure continued total internal reflection. ...
... Total internal reflection and optical fibres Light enters the fibre at an angle greater than the critical angle. Total internal reflection occurs and the ray is reflected in such a way as to ensure continued total internal reflection. ...
The Michelson Interferometer
... nm. The number of visible fringes is counted, and this gives us 2n at once. Hence, from the measurements, ...
... nm. The number of visible fringes is counted, and this gives us 2n at once. Hence, from the measurements, ...
(等倾干涉) — equal thickness interference.
... A thin film with index of refraction n = 1.40 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 7.0 fringes of the pattern produced by light of = 589 nm, what is the film thickness? Solution: The change of optical path difference due ...
... A thin film with index of refraction n = 1.40 is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 7.0 fringes of the pattern produced by light of = 589 nm, what is the film thickness? Solution: The change of optical path difference due ...
10.2 Diffraction Notes
... to accomplish since most natural sources of light are incoherent which means they emit light waves randomly. • It is much easier to observe light if the phases of the waves have a fixed pattern. This is called coherent. ...
... to accomplish since most natural sources of light are incoherent which means they emit light waves randomly. • It is much easier to observe light if the phases of the waves have a fixed pattern. This is called coherent. ...
To understand the basics of reflection and refraction
... • Reflecting light goes at the same angle it hits (from point of view of the surface) • Refracted light will depend on the difference of mediums and the angle. • At some angle (critical angle) the refracted angle is 90 degrees – so you get no refraction bigger entry angles. • Also, reflections polar ...
... • Reflecting light goes at the same angle it hits (from point of view of the surface) • Refracted light will depend on the difference of mediums and the angle. • At some angle (critical angle) the refracted angle is 90 degrees – so you get no refraction bigger entry angles. • Also, reflections polar ...
Photoelectric Effect When light shines on a metal surface, electrons are emitted
... “packages”)? • An increase in intensity of light means more photons are incident, so more electrons will be ejected; but since the energy of each photon is the same, the max KE of electrons is not changed. • If the frequency is increased, the max KE of the electrons increases linearly. • KE = hf • T ...
... “packages”)? • An increase in intensity of light means more photons are incident, so more electrons will be ejected; but since the energy of each photon is the same, the max KE of electrons is not changed. • If the frequency is increased, the max KE of the electrons increases linearly. • KE = hf • T ...
Study guide_2
... 16. Describe how images are formed in the eye and sent to the brain. 17. How is a camera like your eye? Compare the two and identify parts that have similar roles. 18. List two optical devices and how they work. 19. Define the following: a. Crest b. Trough c. Frequency d. Wavelength e. Amplitude 20. ...
... 16. Describe how images are formed in the eye and sent to the brain. 17. How is a camera like your eye? Compare the two and identify parts that have similar roles. 18. List two optical devices and how they work. 19. Define the following: a. Crest b. Trough c. Frequency d. Wavelength e. Amplitude 20. ...
setting up of a total internal reflection fluorescent microscope
... background noise [1]. TIRF utilizes the evanescent field created when a beam of light strikes an interface between two media to excite fluorescent dyes in the specimen. The phenomenon of total internal reflection occurs in which light is reflected but not refracted from a medium boundary and provide ...
... background noise [1]. TIRF utilizes the evanescent field created when a beam of light strikes an interface between two media to excite fluorescent dyes in the specimen. The phenomenon of total internal reflection occurs in which light is reflected but not refracted from a medium boundary and provide ...
Minerals and Their Physical Properties
... Polarizing filters are materials in which electrons can move freely in one direction but not another. ...
... Polarizing filters are materials in which electrons can move freely in one direction but not another. ...
mirrors and lenses - Appoquinimink High School
... Ray 1: leaves the top of the object going parallel to the axis and then refracts through the focal point. Ray 2: passes through F’ and leaves the lens parallel to the axis. Ray 3: goes straight from the object through the center of the lens and back out the same angle. ...
... Ray 1: leaves the top of the object going parallel to the axis and then refracts through the focal point. Ray 2: passes through F’ and leaves the lens parallel to the axis. Ray 3: goes straight from the object through the center of the lens and back out the same angle. ...
PowerPoint version
... results in a mostly blurred image, which is why rough, grainy surfaces do not reflect images well. ...
... results in a mostly blurred image, which is why rough, grainy surfaces do not reflect images well. ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.