What type of lens is used as a magnifying glass?

For which value of the angle of incidence in refraction of light is Snell's law not applicable?

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.

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

Write one use of a convex 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

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