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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 |