Question Library

The magnifying powers of the lenses of a compound microscope are 5 and 6. Calculate the overall magnifying power.

A certain eye subtended 0.035 radians when unaided and later 0.875 radians when aided by a particular optical instrument. Calculate the magnifying power of the instrument.

A short-sighted person's far point is 95cm. The defect can be corrected using

The focal length of the natural eye lens is variable due to the action of the

The defect of the eye lens which occurs when the ciliary muscles are weak is

Bifocal lens is used to correct the eye defect of

An object is placed at different distances, u, from a converging lens of focal length, 15.0cm. For what value of u does the lens act as a microscope?

In order to view the sun, the most suitable instrument to use is?

An astronomical telescope is said to be in normal adjustment when the?

The diagram above illustrates a beam of parallel rays from a distant object O, incident on one side of the total reflecting prism. Which diagram does not represent the correct path of the beam when it emerges from the prism?

Which of the following statements about the Galilean telescope is not correct?

In comparing the camera and the human eye, the film of the camera function as the?

Which of the following is used for the correction of short sightedness?

The ability of the human eye to focus object on the retina is referred to as the power of?

In the microscope, the eyepiece lens merely acts as?