What is reflection ?

What are the values of angle of incidence (i) and that of reflection ( r ) for a normal incidence ?

A wave is reflected from a rigid support. The change in phase on reflection will be

m,n are integers with 0ltnltm . A is the point (m,n) on the Cartesian Plane. B is the rflection of A on theline y=x. C is the reflection of B on the y-axis. D is the reflection of C on the x-axis. And E is the reflection of D on they y-axis. The area of the pentagon ABCDE is

What are the laws of reflection through curved mirrors ?

When light get reflected from a surface, if the angle of incidence is 30^@ , then what about the angle of reflection ?

A crystal was examined with X - rays of wave length 1.53A^(@) with a maximum reflection at 15^(@) 36 . What is the interplanar spacing ? If X - rays of wave length 2.29A^(@) was used, what will be angle of reflection?

Are the angle of reflection and angle of incidence also equal for reflection by curved surfaces ?

The law of reflection of light are valied for