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15 Questions

Power Point Notes

QuestionAnswer
What happens when waves fall on a transparent medium? The waves are partly reflected and partly refracted.
What happens when a wave reaches the boundary between two media? Usually some or all of the wave bounces back into the first medium.
Why are metals such as silver and aluminim so shiny? Light energy does not propagate into the metal, but instead is returned in a reflected wave. Metal surfaces are rigid to light waves.
What does the law of reflection state? That the angle of incidence and the angle of reflection are equal to each other.
What is the normal and how is it drawn? A line perpendicular to the point where the incident ray strikes the barrier, and it is drawn as a dashed line.
What kind of mirrors produce virtual light? Plane mirrors.
What is a convex and concave mirror? A mirror that curves outward, and a mirror that curves inward.
True or False: Mirrors can be grouped according to their shape. If true, what groups are there? True, plane mirrors, convex mirrors, and concave mirrors.
What is an image? A likeness or reproduction of an object.
How are real images formed? By converging light rays and can be displayed on a screen. These images are always inverted.
What are virtual images? Images that seem to be in or behind the mirror. These images are always upright.
What happens when light is incident on a rough surface? The light is reflected in many directions.
What happens to sound energy that is not reflected? It is absorbed or transmitted.
What is acoustics? The study of the reflective properties of surfaces.
What is an echo? Reflected sound.
Created by: 13_EPrice