click below
click below
Normal Size Small Size show me how
Ch. 29 15 Questions
physics
Question | Answer |
---|---|
When light doesn't travel through a mirror, but returned by the mirror's surface the waves are | reflected |
When waves go through a surface and their direction changes they are | refracted |
Waves that are transmitted can be | refracted |
When a wave reaches a boundary between 2 media what happens... | some or all of the waves bounce back into the first medium |
reflection | the return of a wave back into its original medium |
Law of reflection | states that the angle of incidence and the angle of reflection are the same |
normal | a line perpendicular to the surface |
angle of incidence | angle between an angle of incidence and the normal to a surface |
angle of reflection | angle between reflected ray and the normal to a surface |
plane mirrors produce only | virtual images |
virtual images are always | right side up |
Convex | Curved outward and produce a smaller and farther away image |
concave (close up) | curved in up right lager and closer image |
concave (far away) | curved in inverted (real) smaller and farther away image |
When light is incident on a rough surface | it is reflected in many directions |
Diffuse reflection | the reflection of light on a rough surface |
Paper encounters millions of tiny flat surfaces facing all directions so | they are reflected in all directions can be seen from many directions |
a smooth mirrior is only reflected in one direction | can only be seen in certain directions |
Sound energy is | not reflected is absorbed or transmitted |
An echo is | reflected sound |
more sound energy is reflected from | rigid and smooth surfaces |
What's the study of reflective properties of surfaces is | acoustics |
When designing a auditorium the balance between what 2 things is desired? | reverberation and absorption |