Intro to light
... Is light really a wave? Intensity (J/m2) ~ amplitude of the light electric field Energy (J) ~ frequency of the light electro-magnetic field Light oscillating electric field: ...
... Is light really a wave? Intensity (J/m2) ~ amplitude of the light electric field Energy (J) ~ frequency of the light electro-magnetic field Light oscillating electric field: ...
SAMPLE QUESTIONS_and_ANSWERS
... and photonic crystals. There are one-dimensional, two-dimensional and three dimensional photonic crystals. Can you think of analogous structures formed by atomic scale materials ? ...
... and photonic crystals. There are one-dimensional, two-dimensional and three dimensional photonic crystals. Can you think of analogous structures formed by atomic scale materials ? ...
The petrographic microscope
... may be orthoscopic (parallel, without the condenser) or conoscopic (convergent, with the condenser incorporated). The size of minerals that allows for optical identification is not samaller than 0.010 mm. Identification of cryptocrystalline and amorpous materials can be achieved using submicroscopic ...
... may be orthoscopic (parallel, without the condenser) or conoscopic (convergent, with the condenser incorporated). The size of minerals that allows for optical identification is not samaller than 0.010 mm. Identification of cryptocrystalline and amorpous materials can be achieved using submicroscopic ...
Introduction to Fiber Optics
... The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances. However, some of t ...
... The light in a fiber-optic cable travels through the core (hallway) by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances. However, some of t ...
Physics Final Review Packet
... Fill in the diagrams for the mixing of light and the mixing of pigments: See PCR Light Pigment ...
... Fill in the diagrams for the mixing of light and the mixing of pigments: See PCR Light Pigment ...
explanation
... properties of such an object cannot be observed. We need smaller objects, like those one can find inside an atom. In fact, the wave nature of matter undergoes a very important confirmation when in 1927, in two different experiments, C.J. Davisson and L.H. Germer at Bell Labs and G.P. Thomson, observ ...
... properties of such an object cannot be observed. We need smaller objects, like those one can find inside an atom. In fact, the wave nature of matter undergoes a very important confirmation when in 1927, in two different experiments, C.J. Davisson and L.H. Germer at Bell Labs and G.P. Thomson, observ ...
Document
... from the filled valence band to the unfilled conduction band. Ceramics with large values of Eg are transparent to shorter UV wavelengths. In the IR, absorption by elastic vibrations is the result of loss of transparency. This absorption occurs at longer wavelengths for materials that contain large i ...
... from the filled valence band to the unfilled conduction band. Ceramics with large values of Eg are transparent to shorter UV wavelengths. In the IR, absorption by elastic vibrations is the result of loss of transparency. This absorption occurs at longer wavelengths for materials that contain large i ...
Light Study Guide
... has been studied for many years. Some of the ancients, thought that light was made up of tiny __________________ that entered the eye. Others, like P________, S______________ and E__________, thought that vision resulted from s__________________ or f________________ that ______________ the eye. This ...
... has been studied for many years. Some of the ancients, thought that light was made up of tiny __________________ that entered the eye. Others, like P________, S______________ and E__________, thought that vision resulted from s__________________ or f________________ that ______________ the eye. This ...
Light II - Galileo and Einstein
... • Newton’s contemporary Christian Huygens believed light to be a wave, and pictured its propagation as follows: at any instant, the wave front has reached a certain line or curve. From every point on this wave front, a circular wavelet goes out (we show one), the envelope of all these wavelets is th ...
... • Newton’s contemporary Christian Huygens believed light to be a wave, and pictured its propagation as follows: at any instant, the wave front has reached a certain line or curve. From every point on this wave front, a circular wavelet goes out (we show one), the envelope of all these wavelets is th ...
Optics - Mr. Gallagher's Physics
... • The incident ray is the light ray that strikes the mirror. • The reflected ray is the light ray that bounces off the mirror • Between the incident and reflected rays, there is an imaginary line called the normal line which is perpendicular to the surface of the mirror. • The angle between the inci ...
... • The incident ray is the light ray that strikes the mirror. • The reflected ray is the light ray that bounces off the mirror • Between the incident and reflected rays, there is an imaginary line called the normal line which is perpendicular to the surface of the mirror. • The angle between the inci ...
Common Lighting Terminology Ambient Light The light already
... A broad beam of light, less directional and intense than a spot. ...
... A broad beam of light, less directional and intense than a spot. ...
Photoelectric Effect - Data Analysis Exercise
... http://phet.colorado.ed.au/en/simulation/photoelectric First, with the circuit set up so that the battery is attracting electrons: 1. The photoelectric effect occurs when ______________ shines on a metal. Electrons can absorb the energy from the light. If there is enough energy, they can __________ ...
... http://phet.colorado.ed.au/en/simulation/photoelectric First, with the circuit set up so that the battery is attracting electrons: 1. The photoelectric effect occurs when ______________ shines on a metal. Electrons can absorb the energy from the light. If there is enough energy, they can __________ ...
dec 2016_nature of light unit test review sheet answer key
... 2. What is the relationship between the size of a shadow on a screen and the distance of the screen from the object that produces the shadow? - When an object is closer to a screen, the shadow size decreases. - When an object is further away from a screen, the shadow size increases. 3. What is the r ...
... 2. What is the relationship between the size of a shadow on a screen and the distance of the screen from the object that produces the shadow? - When an object is closer to a screen, the shadow size decreases. - When an object is further away from a screen, the shadow size increases. 3. What is the r ...
6. Light Scattering, Reflection, and Refraction
... Rayleigh Scattering When a photon penetrates into a medium composed of particles whose sizes are much smaller than the wavelength of the incident photon, the scattering process is elastic and is called Rayleigh scattering. In this scattering process, the energy (and therefore the wavelength) of the ...
... Rayleigh Scattering When a photon penetrates into a medium composed of particles whose sizes are much smaller than the wavelength of the incident photon, the scattering process is elastic and is called Rayleigh scattering. In this scattering process, the energy (and therefore the wavelength) of the ...
Operating Principles
... There are three types of electron transitions, as shown in figure 2. The first type of transition, shown in figure 2 (a), is known as resonant absorption. An electron transits from the stable low energy level, E1, to the higher energy level, E2, by absorbing light. Figure 2 (b) shows spontaneous emi ...
... There are three types of electron transitions, as shown in figure 2. The first type of transition, shown in figure 2 (a), is known as resonant absorption. An electron transits from the stable low energy level, E1, to the higher energy level, E2, by absorbing light. Figure 2 (b) shows spontaneous emi ...
Science Focus 8 Light and Optical Systems Topic 7 Topic 7 – The
... * Turn to page 238 and 239 and read “Looking at Wavelength”. The Wave Model of Light The WAVE MODEL OF LIGHT pictures light travelling as a wave. It doesn't explain everything about how light behaves but it helps us visualize certain things about it. Thinking about light travelling in waves, helps t ...
... * Turn to page 238 and 239 and read “Looking at Wavelength”. The Wave Model of Light The WAVE MODEL OF LIGHT pictures light travelling as a wave. It doesn't explain everything about how light behaves but it helps us visualize certain things about it. Thinking about light travelling in waves, helps t ...
Linking Asteroids and Meteorites through Reflectance Spectroscopy
... • Lens focuses red and blue light slightly differently ...
... • Lens focuses red and blue light slightly differently ...
PowerPoint Presentation - CUE Web Summary for halldweb.jlab.org
... Some Remarks on Calibration of BCAL. After recent I made some tests and communications with I didn’t measure any the BCAL team, seems deterioration of the that we have to use a 2 signal. wire cable, 5-10 cm, from the board so as Do we need an only the LED is extension with the attached on the ...
... Some Remarks on Calibration of BCAL. After recent I made some tests and communications with I didn’t measure any the BCAL team, seems deterioration of the that we have to use a 2 signal. wire cable, 5-10 cm, from the board so as Do we need an only the LED is extension with the attached on the ...
Name: ANSWER KEY Period: Date: Nature of Light Unit Test Review
... 3. When John looked at a red object through a green filter. What color did the object appear? Why do color filters change the color of an object viewed through a filter? - The object appear black, because the color filter absorbs the red wavelengths of light being reflected from the object. 4. Why d ...
... 3. When John looked at a red object through a green filter. What color did the object appear? Why do color filters change the color of an object viewed through a filter? - The object appear black, because the color filter absorbs the red wavelengths of light being reflected from the object. 4. Why d ...
Chapter1 Fundamental law of geometrical optics 第一章 几何光学的
... 13.000 for red light. Ⅱ. Rays and Waves The path along which light travels are known as rays in a homogeneous medium, they are straight lines. ﹡The location and brightness of an image can be determined by ray method. ﹡ The fine structure and distribution of light with an image are determined by wave ...
... 13.000 for red light. Ⅱ. Rays and Waves The path along which light travels are known as rays in a homogeneous medium, they are straight lines. ﹡The location and brightness of an image can be determined by ray method. ﹡ The fine structure and distribution of light with an image are determined by wave ...
OPTICAL MINERALOGY
... 1. Particle theory - release of a small amount of energy as a photon when an atom is excited. 2. Wave theory - radiant energy travels as a wave from one point to another. Waves have electrical and magnetic properties => electromagnetic variations. Wave theory effectively describes the phenomena of p ...
... 1. Particle theory - release of a small amount of energy as a photon when an atom is excited. 2. Wave theory - radiant energy travels as a wave from one point to another. Waves have electrical and magnetic properties => electromagnetic variations. Wave theory effectively describes the phenomena of p ...
chapter 22 - Cobb Learning
... travel through empty space or through matter. 3. An electromagnetic wave has a magnetic field and an electric field that travel at right angles to one another. 4. In an electromagnetic wave the electric and magnetic field are also at right angle, or perpendicular to the direction the wave is ...
... travel through empty space or through matter. 3. An electromagnetic wave has a magnetic field and an electric field that travel at right angles to one another. 4. In an electromagnetic wave the electric and magnetic field are also at right angle, or perpendicular to the direction the wave is ...
Shaping the color - University of Guelph
... (a) This photonic waveguide formed from a thin silicon membrane contains a triangular lattice of air holes separated by 300 nm. (b) A plot of transmission versus wavelength for the device shows that it has a photonic band gap between 725 nm and 825 nm if the electric field associated with the elect ...
... (a) This photonic waveguide formed from a thin silicon membrane contains a triangular lattice of air holes separated by 300 nm. (b) A plot of transmission versus wavelength for the device shows that it has a photonic band gap between 725 nm and 825 nm if the electric field associated with the elect ...
Transparency and translucency
In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered. On a macroscopic scale (one where the dimensions investigated are much, much larger than the wavelength of the photons in question), the photons can be said to follow Snell's Law. Translucency (also called translucence or translucidity) is a super-set of transparency: it allows light to pass through, but does not necessarily (again, on the macroscopic scale) follow Snell's law; the photons can be scattered at either of the two interfaces where there is a change in index of refraction, or internally. In other words, a translucent medium allows the transport of light while a transparent medium not only allows the transport of light but allows for image formation. The opposite property of translucency is opacity. Transparent materials appear clear, with the overall appearance of one color, or any combination leading up to a brilliant spectrum of every color.When light encounters a material, it can interact with it in several different ways. These interactions depend on the wavelength of the light and the nature of the material. Photons interact with an object by some combination of reflection, absorption and transmission.Some materials, such as plate glass and clean water, transmit much of the light that falls on them and reflect little of it; such materials are called optically transparent. Many liquids and aqueous solutions are highly transparent. Absence of structural defects (voids, cracks, etc.) and molecular structure of most liquids are mostly responsible for excellent optical transmission.Materials which do not transmit light are called opaque. Many such substances have a chemical composition which includes what are referred to as absorption centers. Many substances are selective in their absorption of white light frequencies. They absorb certain portions of the visible spectrum while reflecting others. The frequencies of the spectrum which are not absorbed are either reflected back or transmitted for our physical observation. This is what gives rise to color. The attenuation of light of all frequencies and wavelengths is due to the combined mechanisms of absorption and scattering.Transparency can provide almost perfect camouflage for animals able to achieve it. This is easier in dimly-lit or turbid seawater than in good illumination. Many marine animals such as jellyfish are highly transparent.