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# Chap.29-PP Questions

When waves interact with matter,what happens? They can be reflected, transmitted, or a combination of both. Waves that are transmitted can be refracted.
Usually some or all of the wave bounces back into the first medium when a wave reaches what? A boundary between two media.
What is reflection? The bouncing back of a particle that strikes a boundary between two media.
What happens to waves after a reflection? (2) Some waves are totally reflected and all of the wave's energy bounces back.Some waves are partially reflected, and some of the wave's energy bounces back while some of it moves into the new medium.
What does the Law of Reflection state? It states that the angle of incidence and the angle of reflection are equal to each other.
Name the two angles that occur when light bounces off a mirror and what is the name of the line that is drawn where the first ray strikes the barrier? Angle of Incidence, Angle of Reflection, and the Normal.
what type of images do plane mirrors produce? Only Virtual Images.
Name the three types of mirrors and describe each one. First there is a plane mirror that is flat. Second, there is a convex mirror that is curved outwards. Last, there is concave mirror that curves inward.
What are virtual images and real images? Virtual images are images that seem to be behind the mirror and these images are always upright. Real images are images formed by converging light rays and can be displayed on a screen. These images are always inverted.
What happens when light is incident on a rough surface? It is reflected in many directions.
What is duffuse reflection? Describe it It is the reflection of light from a rough surface. Each ray obeys the Law of Relfection. The many different angles that incident light rays encounter at the surface cause reflection in many directions.
Whether a surface is a diffuse reflector or a polished reflector depends on what? It depends on the wavelength of the wave it reflects.
What happens when sound energy is not reflected? It is absorbed or transmitted.
WHat is the study of the reflective properties of surfaces? Acoustics
What is needed in the design of an auditorium or concert hall? A balance between reverberation and absorption is desired.
Created by: alaschober

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