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Refract/Reflect Ch29
cdeutsch/ursuline
Question | Answer |
---|---|
What happens to light waves when they are returned from a mirror's surface? | The waves are reflected. |
What happens when light waves hit a transparent medium, like water, at an angle? | The direction of the wave changes and the wave is refracted. |
What usually happens when waves hit a transparent medium? | Waves are partly reflected and partly refracted |
What is the bouncing back of a particle or wave that strikes a boundary b/t two media? | Reflection occurs. |
What happens when a wave is totally reflected? | All the energy bounces back and the second medium must be very rigid. |
What happens when waves are partially reflected? | Some of the wave's energy bounces back, but some moves into the new medium. The second medium is less rigid. |
What is important to remember about metals and light waves? | Metal surfaces are rigid to light waves, light energy is reflected back and make metals shiny, and they contain all frequencies of visible light |
What materials are less rigid than metals to light waves? | water and glass |
What happens when light shines perpendicularly on the surface of still water? | 2% of its energy is reflected and the rest is transmitted. |
What happens when light strikes glass perpendicularly? | 4% of the energy is reflected and except for a slight losses, the rest is transmitted. |
What do you call a light wave that strikes a boundary? | an incident wave |
How is a light wave that strikes a boundary represented? | Its path is drawn as a straight line or arrow called an incident ray |
What is a light wave that bounces off a boundary called? | A reflected wave |
What is the line called that is drawn perpendicular to the point where the incident ray? | the normal |
What is the angle called that is formed b/t the incident ray and the normal? | Angle of Incidence |
What is the angle called that is formed b/t the reflected ray and the normal? | Angle of Reflection |
The Angle of Incidence and the Angle of Reflection are equal; this fact is referred to as the | Law of Reflection |