Chapter 29 2nd set of questions
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| What is a normal? | Rays making equal lines to a perpendicular line, which is called the normal.
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| What percent of light is returned when light shimmers on water. | 2%
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| What is the angle of incidence? | The angle between the incident ray and the normal called the angle of incidence.
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| What is a plane mirror? | A mirror that is flat.
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| What is a concave mirror? | A mirror that curves inwards.
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| What is a convex mirror? | A mirror that curves outwards.
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| What is a virtual image? | An image that appears to be in a location where light doesn't reach.
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| What are wave fronts? | Wave fronts are lines drawn that represent the positions of different crests.
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| What is Refraction? | Refraction is the bending of a wave as it crosses the boundary between 2 media at an angle
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| What causes mirages? | Mirages are caused by the refraction of light in the earths atmosphere.
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| What is dispersion? | Dispersion is the separation of light into colors arranged according to their frequency.
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| Do different frequencies of light travel at different speeds? | Yes, visible light of higher frequencies travel slower than light of lower frequencies.
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| How can you see a full color spectrum in a rain drop? | Light that enters the raindrop is dispersed into spectral colors.
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| What is a critical angle? | A critical angle is the angle of incidence that results in the light being refracted at an angle of 90 degrees.
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| What is total internal reflection? | The complete reflection of light back into its original medium.
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