Question Bank

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:

Light travels from air into glass of RI 1.5. If the wavelength in air is 6000 Angstroms, what is the wavelength in glass?

The phenomenon of 'Total Internal Reflection' is used in:

A point source of light is placed at the bottom of a tank of water (n=4/3) of depth 1m. The area of the surface of water through which light can emerge is:

A ray of light is incident at 60 degrees on one face of an equilateral prism. If it suffers minimum deviation, the angle of deviation is:

What is the relation between velocity (v), frequency (f) and wavelength (λ)?

If two plane mirrors are kept at an angle of 60 degrees to each other, the number of images formed is:

A glass slab of thickness 3 cm and RI 1.5 is placed over a paper. What is the apparent shift of the letters?

Which of the following is used in a solar furnace?

Potential energy is zero when:

What is the power of a pump that can lift 50 kg of water to a height of 10 m in 5 seconds? (g = 10 m/s^2)