You Place a Point Source of Light at the Bottom

Multiple Choice

You place a point source of light at the bottom of a pool of water 1.00 m deep. The source emits rays upward in all directions. You notice that a circle of light is formed by the rays that are refracted into the air and that the rays outside of this circle are reflected back into the water. The index of refraction of water is 1.33. The radius R of the circle at the surface of the water is approximately

A) 0.75 m.
B) 1.00 m.
C) 1.13 m.
D) 1.33 m.
E) infinite.