Question

In the ray approximation for light, the ray points in what direction?

1-The direction that the magnetic field is oscillating
2-At right angles to the surface that the light is incident upon
3-The direction that the wave fronts are moving
4-The direction that the electric field is oscillating

Answer 1

(2) In case the ray approximation for light, the ray will point at right angles to the surface on which the light is incident. It totally follows the law of reflection.

If the concept is followed in a proper manner, it will be easy to infer the result properly.