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Refract/Reflect Ch29


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
Created by: cdeutsch