A ray parallel to the principal axis of a concave mirror follows which path after reflection by the concave mirror?

In the case of refraction of white light through a prism, the light of colour which deviates the least is yellow orange red violet

Whether a concave lens is called a converging or diverging lens? Answer with reason.

Write Snell's law of refraction of light. OR Write two characteristics of the image of an extended object formed when it is placed in between the optical centre and focus of a thin convex lens.

Where is the image formed if the object is placed in between f and 2f of a convex lens ?

State whether the refractive index of a medium would increase or decrease if the angle of incidence is increased.

If the refractive indices of a medium for red and blue colours of light are μr and μb respectively, which one is greater in magnitude?

Which type of mirror is used in the headlight of a motor car?

Is it possible to form a virtual image of shorter length than the length of the object by any mirror?

Dentists use (a) convex mirror (b) convex lens (c) concave mirror (d) concave lens

The wavelength of which of the following is greater than that of visible light? (a) x-ray (b) infrared ray (c) γ - ray (d) ultraviolet ray

If the radius of curvature of a concave mirror is 20 cm, then focal length of the mirror will be (a) 20 cm (b) 15 cm (c) 10 cm (d) 40 cm