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# 819 Chapter 29 notes

What is Reflection? Reflection is the bouncing back of a particle or wave that strikes a boundary between two media.
What happens when waves are totally reflected from a surface? All of the wave's energy bounces back, and The second medium must be very rigid.
What happens when waves are partially reflected from a surface? Some of the wave's energy bounces back, but some moves into the new medium. The second medium must be less rigid.
What happens to light waves when light hits a rigid metal surface? Light energy is returned in a reflected wave, it does NOT propogate into the metal.
What law states that the angle of incidence and the angle of reflection are equal to each other? The Law of Reflection.
What is a light wave that strikes a boundary? An Incident wave.
What is a light wave that bounces off a boundary? A Reflected wave.
What are the mirror/mirrors that produce virtual images? Plane and Convex mirrors
What are real images? And what type of mirrors produce them? Real images are formed by converging light rays and can be displayed on a screen. They are always inverted. Concave mirrors are the only type of mirrors that produce real images.
What is Diffuse Reflection? The reflection of light from a rough surface
What do rays of visible light do when they reflect from paper? They encounter millions of tiny flat surfaces facing in all directions, so they are reflected in all directions and can be seen from many angles.
What do rays of visible light do when they reflect from a smooth mirror? It is only reflected in one direction, an orderly pattern and can only be seen at a certain angle.
What happens to sound energy when it is not reflected? The sound energy is absorbed or transmitted.
More sound energy is reflected from what kind of surface rather than another? More sound energy is reflected from a rigid and smooth surface than from a soft and irregular surface.
When walls are too freflectice, the sound becomes garbled becuase of what? Becuase of multiple reflections of sound called Reverberations.
Created by: amwolf
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