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ch.29 15 questions.

mrs. kohl homework 2/10/10

QuestionAnswer
Why doesn't light travel threw a mirror? Light doesn't travel threw a mirror, but is returned by its surface.
A light wave that strikes a boundary is called a_________________ incident wave.
A light wave that bounces off a boundary is called a __________ reflected wave.
A line drawn perpendicular to the point where the incident ray strikes the barrier is called a _______________ normal
What is a flat mirror called? a plane mirror
What type of mirror curves outward? convex mirror
What type of mirror curves inward? concave mirror
What happens when light is incident on a rough surface? It is reflected in many directions.
Sound energy is not reflected, but is________ or________ absorbed or transmitted
What is an echo? a reflected sound.
What is the story of reflective properties of a surface? acoustics
When a wave that is traveling at an angle changes its speed upong a crossing boundary between two medias, what happens? it bends
What do plane mirrors only produce? a virtual image
When are sound waves refracted? when parts of a wave front travel at different speeds.
What causes refraction? When there are changes in the speed of light, as it passes from one medium to another, or variations in the temperatures and densities of the same meadium.
Created by: mkeathley