An aquarium filled with water has flat glass sides whose index
of refraction is 1.52. A beam of light from outside the aquarium
strikes the glass at an angle of 43.5o (with respect to the
perpendicular, ie. normal). What is the angle of this light ray
when it is a) inside the glass and b) inside the water? C) If
the light entered along the perpendicular (ie, 0o), determine
the refracted angle in the water.