Physics

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:

Which of the following is true for a simple microscope?

The refractive index of a prism is 1.5 and the angle of prism is 60. The angle of minimum deviation is:

If the speed of light in medium A is 2x10^8 m/s and in medium B is 2.5x10^8 m/s, the refractive index of A with respect to B is:

For a compound microscope, the intermediate image is:

In an astronomical telescope, the focal length of the objective is 100 cm and that of the eyepiece is 5 cm. The magnifying power is:

Cauchy's equation relates refractive index (n) and wavelength (λ) as:

The dispersive power of a prism depends on:

A convex lens forms a real image of a point object on the principal axis. If the upper half of the lens is painted black: