Embibe Experts Solutions for Chapter: Ray Optics, Exercise 1: NDA & NA EE 2019 Paper 1 General Ability Test

The part of the human eye on which the image is formed is

The Sun appears reddish during sunrise and sunset. The phenomenon in optics which is responsible for this appearance of the Sun is

A lens has a power of $+2·0$ Dioptre. Which one of the following statements about the lens is true?

The refractive index of fused quartz is $1·46$ and that of sapphire is $1·77.$ If $v_q$ is the speed of light in quartz and $v_s$ is the speed of light in sapphire, then which one of the following relations is correct?

In case of a concave mirror, if an object is kept between principal focus $F$ and pole $P$ of the mirror, then which one of the following statements about the image is not correct?

Light rays move in straight lines. But through an optical fibre, they can move in any type of zig-zag path because

The sun is seen little before it rises and for a short while after it sets. This is because of

When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is