Complete the following sentence:

Angle of deviation is the angle which the .................ray makes with the direction of ................ray.

Q. Complete the following sentence :
Angle of deviation is the angle which the .................... ray makes with the direction of ................... ray.

Q. Angle of deviation is the angle which the ................. ray makes with the direction of ................. ray.

Q. A ray of light falls on the surface of a spherical glass paperweight making an angle $\alpha$ with the normal and is refracted in the medium at an angle $\beta$. The angle of deviation of the emergent ray from the direction of the incident ray

Q.

Find out the angle of deviation after reflection, if the incident ray makes 30⁰ with the normal?

Q. A plane mirror makes an angle of ${30}^{\circ }$ with the horizontal. If a ray strikes the mirror vertically as shown in the figure, find the angle of deviation of reflected ray from the incident ray.