In this Activity, you will analyze three different cases of a thin film between two materials. Consider what happens when light starts in the top material (e. g. air for Case 1), will light reflecting off of surface A undergo a phase shift, will light reflecting off of surface B undergo a phase shift? Then consider what happens when light starts in the bottom material (e. g. glass for Case 1).

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.

When solid surfaces slide over each other the kind of friction that occurs is called friction