The energy of light is given by one major characteristie. which characteristic is this, and give the equation which relates the two. (m) what is the mass of a photon? (n) what does this naively imply about the momentum of light? (o) what is the correct equation for the momentum of light? question 9 light, traveling from the air, is incident on the surface of a pond at an angle of 30 with respect to the vertical. calculate the angle that the light makes once in the water. note: let the index of refraction for air be nair1.00 and the index of refraction for water be nwater 1.33.