chapter29
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| Light that doesn't travel through a mirror is...? | reflected
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| What does the Law of Reflection state? | that the angle of incidence equals the angle of reflection.
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| What is the line perpendicular to where the incident ray strikes? | the normal
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| A regular mirror is called...? | plane
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| A plane mirror always shows what kind of image? | virtual
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| A virtual image is always...? | right side up
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| what is a mirror that curves outward? | convex
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| what is a mirror that curves inward? | concave
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| What kind of mirror creates a focal point? | concave
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| Is a real image right side up or inverted? | inverted
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| What is a diffuse reflection? | a reflection from a rough surface
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| Each ray in a diffuse relfection...? | obeys the law of reflection
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| What is reflected sound called? | an echo
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| The study of sound is called...? | acoustics
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| Reflections of sound are called...? | reverberations
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| What is it called when a wave bends when it crosses the boundary between two media? | refraction
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| Do waves travel faster in deep or shallow water? | shallow
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| What represents the postitions of different waves? | wave fronts
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| When do sound refractions occur? | uneven winds and changes in temperature
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| Does sound travel faster in warm or cold air? | warm
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| Changes in speed of light, as it passes from one medium to another, or variations in the temperature and densities of the same medium cause what? | refractions
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| does light travel faster in air or water? | air
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| Becuase light slows down when it enters water, the wave bends ________ the normal. | towards
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| a distorted image caused by refraction of light in Earth's atmosphere | mirage
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| The _____________ of part of the wave nearest the ground produces a gradual bending of light rays | speeding up
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| a mirage is a...... | real image
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| despersion is... | the separation of light into ranges of color according to their frequency
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| desperion happens when light passes through a .... | prism
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| in despersion, does red or violet bend more? | violet
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| The conditions to see a rainbow are.... | 1. the sun has to be in one part of the sky2. the water droplets have to be in the other side of the sky3. you have to have your back to the sun
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| What happends when the angle of incidence is larger than the critical angle? | total interbal reflection
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| What is the critical angle? | the angle of incidence at which the light is reflected at an angle of 90 degrees
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| when there is a critical angle the intensity of the emerging beam is...? | zero
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| optical fibers are sometimes called | light pipes
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| optical fibers use ______ to disperse light | a series of total internal reflections
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