Light

A ray of light passes from air into a liquid. The angle of incidence is 45 and angle of refraction is 30. Find refractive index.

Periscope works on the principle of:

If a lens has a power of -2.5 D, what is its focal length?

Which part of the eye controls the amount of light entering it?

The refractive index of diamond is 2.42. What is the speed of light in diamond?

For a healthy eye, the far point is at:

The angle between the incident ray and the reflected ray is 80 degrees. What is the angle of incidence?

A virtual image larger than the object can be produced by:

Dispersion of light in a prism is caused by:

Which of the following remains constant when light travels from one medium to another?

What is the power of a combination of a convex lens (f=20cm) and a concave lens (f=25cm)?

A ray of light passes from air to water. If the angle of incidence is increased, the angle of refraction:

The refractive index of a medium is 1.5. The speed of light in that medium is:

If the magnification produced by a lens is -0.5, the image is:

Light enters from air into water (n=1.33). What is the critical angle for the water-air interface?

An object is placed at a distance of 12 cm from a concave mirror of focal length 15 cm. The image is:

Two thin lenses of power +3.5 D and -1.5 D are placed in contact. The focal length of the combination is:

A ray of light is incident on a glass slab at an angle of 60. If the refractive index is 1.732 (sqrt 3), the lateral shift depends on:

In a displacement method, the two magnifications of an object are 4 and 0.25. The size of the object is:

A lens of power +5 D is submerged in a liquid of refractive index equal to that of the lens material. Its power becomes: