Question

Define grazing angle,depression angle and incidence angle

Answer 1

The angle formed formed by a ray and a line perpendicular to surface at a point of incidence is called angle of incidence...

The angle made by incident ray with the surface is called angle of glancing

Answer 2

Answer:

1. the glancing angle occurring in grazing incidence.
2. The angle of elevation is when you are measuring the angle from the floor or the ground, and the angle of depression is when you are measuring from a ceiling. The only time the two angles are equal is if the ceiling and floor are parallel with each other. If you know your angle terms these are opposite interior angles.
3. In geometric optics, the angle of incidence is the angle between a ray incident on a surface and the line perpendicular to the surface at the point of incidence, called the normal. The ray can be formed by any wave: optical, acoustic, microwave, X-ray and so on.