What happens when a light ray passes through the focal point, and then reflects off of a convex mirror?
a. the reflected ray will run parallel to the center of curvature.
b. the reflected ray will run parallel to the principal axis.
c. the reflected ray will pass through the center of curvature.
d. the reflected ray will pass through a point between the center of curvature and the focal point.
e. the reflected ray will pass through a point between the focal point and the vertex.

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.