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| Reflection is when a wave reaches the boundary between two media and _________ ______ into the first medium? |
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| At a boundary, part of a wave is usually _____________ and part usually passes into the second medium. |
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| State the law of reflection. |
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Definition
| The angle of incidence = the angle of reflection. |
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| A plane mirror forms a virtual image or a real image? |
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| In a plane mirror, the image appears to be as far in back of the mirror as the object in front of it, and is the _______ ________ as the object. |
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Term
| Light that falls on a rough surface is reflected _______________ |
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| When a wave reaches the boundary between two media and changes direction as it passes into the second medium it is called ________________ |
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| Refraction is caused by a difference in the ________ of the light wave in two media. |
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| The speed of light in materials depends on _______________, causing the different colors that make up white light to refract differently and spread out to form a visible spectrum. |
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| Explain total internal reflection. |
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Definition
| An incident wave on a boundary is at an angle such that none of the wave can be refracted, so only reflection occurs. |
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| When waves remain in one medium and reverse directions it is called ___________________. |
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| Does the law of reflection apply to partially reflected waves or totally reflected waves? |
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| When you have an image at a position where _______ does not start, you have a virtual image. |
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| If you wish to take a picture of your image while standing 2m in front of a plane mirror for what distance would you set your camera to provide sharpest focus? |
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| Tell me about diffuse reflection. |
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Definition
| When light is incident on a rough surface |
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Definition
| Multiple reflections. Happens when the walls are too reflective or hard. |
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| When designing a concert hall, which is more desirable, reverberation or absorption of sound? |
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| Sound and light obey/don't obey the same law of reflection. |
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| If you can ________ an instrument in an orchestra either reflected or unaided, you can hear it if it is played loudly enough. |
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| Any continuous portion of a 2-D or 3-D wave in which the vibrations are all the same way at the same time is called a __________ _________. |
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| A floating image that appears in the distance and is due to the refraction of light in Earth’s atmosphere is called a __________. |
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| The separation of light into colors arranged according to their frequency by interaction with a prism or diffraction grating is called ____________. |
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| If light traveled at the same speed in raindrops as it does in air, would we still have rainbows? |
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Definition
| No. If there is no change in speed there is no refraction. If there is no refraction, there is no dispersion of light and hence, no rainbow! |
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Term
| The minimum angle of incidence for which a light ray is totally reflected within a medium is called the ______________ _______________. |
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| The 100% reflection (with no transmission) of light that strikes the boundary between two media at an angle greater than the critical angle is called _______ ________ ________. |
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Definition
| total internal reflection |
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| A transparent fiber, usually of glass or plastic that can transmit light down its length by means of total internal reflection is called ____________ ___________. |
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