Complete angle

Complete the analogy : Angle of incidence : 60⁰ :: Angle of reflection : ………….

ABC is a triangle with angle B greater than angle C . D and E are points on BC such that AD is perpendicular to BC and AE is the bisector of angle A. Complete the relation angle DAE = 1/2 [(…..) - angle C]

Complete the following sentence : Angle of deviation is the angle which the ____ray makes with the direction of _____ray.

When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30^@ , the reflected light is found to be completely plane polarized Determine Angle of refraction.

The diagram alongside shows a light source P embedded in a rectangular glass block ABCD of critical angle 42^@ . Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles.]

Complete the folloiwng statemetns: Among two congruent angles, one has a measure of 70^o the measure of the other angle is ______.