Correct the following sentences if required:
Mirrage is observed due to total internal reflection.

Correct the following sentences if required: All real images are inverted.

Correct the following sentences if required: The images formed due to reflection from a spherical (concave/ convex) mirror are laterally inverted.

Correct the following sentences if required: The reflected ray is found to rotate through an angle of 60^@ . Then the plane mirror must have rotated through 120^@ .

Correct the following sentences if required: A plane mirror is a better reflector than a right angled prism.

Explain what is total internal reflection.

Correct the following sentences if required: The power of a lens is numerically equal to its focal length.

Correct the following sentences, if required changing the underlined portion. The refractive index of a medium depends on the angle of the minimum deviation.

Correct the following sentences, if required changing the underlined portion. The refractive index of a medium depends on the angle of the prism.

Correct the following sentences if required: mu = sin C where mu = refractive index, C = critical angle

Correct the following sentences, if required changing the underlined portion. The refractive index of different colours of light varies directly with their wavelength.