optical Instruments

Which of the following is correct? (A) The size of image on the retina is roughly proportional to the angle subtended by the object on the eye. This angle is known as visual angle. The optical instruments are used to increase the visual angle (B) In normal adjustment, eye is least strained and final image is formed at infinity (c) The magnifying power is written with a unit X (D) All options are correct

The optical instrument with zero power is

Microscope is an optical instrument which

Resolvingpower of an optical instrument is the ability of the instrument to………….or………..the images of………… .

The magnifying power of an optical instrument is expressed in

Resolving power of an optical instrument is associated with

Define resolving power of an optical instrument.

The limit of resolution of an optical instrument arises on account of