Light

What is the angle of incidence when a ray of light is reflected back along its own path from a spherical mirror?

The velocity of light in two media A and B are 2x10^8 m/s and 2.5x10^8 m/s. The critical angle for light going from A to B is:

A point object is placed 10 cm from a convex lens of focal length 20 cm. The image formed is:

Dispersion in a prism is primarily caused by:

A simple microscope has a lens of focal length 5 cm. Its magnifying power for relaxed eye (image at infinity) is:

The sun is visible a few minutes before actual sunrise due to:

The refractive index of a medium is 1.732. What is the angle of refraction if the angle of incidence is 60 degrees?

What is the power of a plane glass plate?

A ray of light falls on a glass surface at an angle of 30 degrees with the surface. If it is reflected, what is the angle between incident and reflected ray?

Yellow light is used in sodium lamps for street lighting because:

How many refractions does a ray of light undergo in a glass slab?

The image formed by a concave lens is always:

If the distance of an object from a convex lens is increased, what happens to the size of the real image?

A person with Hypermetropia uses a lens of +2.0 D. Where is his near point?

Which of the following is used to see objects hidden around corners?

What is the relation between the speed of light in vacuum (c), speed in medium (v) and refractive index (n)?

If the angle of incidence is 0 degrees, the angle of refraction is:

The focal length of a lens depends on:

A ray of light is incident on a plane mirror. If the mirror is rotated by 10 degrees, the reflected ray rotates by:

What is the focal length of a magnifying glass of power 20 D?