Question Bank

Which mirror can form both real and virtual images?

If the refractive index of water is 1.33 and glass is 1.5, in which medium does light travel faster?

Calculate the focal length of a lens with power +2.0 D.

An object is placed at the center of curvature (C) of a concave mirror. The magnification produced is:

A ray of light enters a glass slab perpendicularly (at 90 degrees to the surface). The angle of refraction is:

The critical angle for a medium is 45 degrees. What is its refractive index?

For a convex lens, where should an object be placed to get a virtual and magnified image?

Total Internal Reflection occurs when light travels from:

What is the relation between the radius of curvature (R) and focal length (f) of a spherical mirror?

A convex mirror always produces an image which is:

If an object is placed 20 cm from a concave mirror of focal length 10 cm, the image is formed:

Which of the following is the correct lens formula?

A diver inside water sees the outside world through a circular area. This is due to:

In which medium is the speed of light minimum?

The refractive index of glass with respect to air is 3/2. What is the refractive index of air with respect to glass?

The focal length of a plane mirror is:

What is the magnification of a plane mirror?

An object is placed at infinity from a convex lens. The image is formed at:

The power of a concave lens of focal length 25 cm is:

Which of the following is NOT a primary color of light?