11) A glass plate has a thickness of 4.0 mm. A light beam is incident from air towards the glass plate at an angle of incidence of 60 °. How long does it take for the light beam to pass the glass plate? The refractive index of the glass is 1.55.

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.