A Beam of Light Passes from Air to Water at an Incident

A beam of light passes from air to water at an incident angle of 40°, relative to a plane perpendicular to the boundary between the two. At what angle will it emerge into the water, relative to a plane perpendicular to the boundary?

A) less than 40°
B) exactly 40°
C) more than 40°
D) The beam of light does not emerge from the water.
E) There is not enough information to answer the question.