When the light is reflected from the surface of the mirror, its speed and wavelength will

When light is reflected from a mirror a change occurs in its :

When a light ray is incident normally on the surface of a plane mirror, the reflected ray deviates through an angle of ________

When a ray of light passes from air medium to denser medium then its speed and wavelength

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

When light is reflected from a surface it can be either regular reflection or diffuse reflection. The essential difference between regularly and diffusely reflecting surfaces is that

A monochromatic light of wavelength lamda is incident on plane reflecting surface. After reflection, its wavelength will be