Umakant Kondapure, Collin Fernandes, Nipun Bhatia, Vikram Bathula and, Ketki Deshpande Solutions for Chapter: Ray Optics, Exercise 1: Classical Thinking

The objective of reflecting telescope is

A ______ is fixed at the focal point of the objective, which reflects the collected rays to the eyepiece.

Out of the following optical instruments which one is independent of chromatic and spherical aberrations?

Two thin lenses of power $+15\mathrm{D}$ and $-5\mathrm{D}$ are in contact will each other. The focal length of the combination:

An optical instrument, in general, extends our range of vision by

For observing fainter distant objects and for high resolving power which of the following telescope should be used?

The reciprocal of $\left(\frac{{\mu }_2-{\mu }_1}{R}\right)$ gives the value of

The magnifying power of simple microscope is $6$ when the image is formed at distance of distinct vision $(25 \mathrm{cm})$ from its optical centre. The focal power of the simple microscope in dioptre is