Embibe Experts Solutions for Chapter: Light - Reflection and Refraction, Exercise 1: Gujarat Board-2019

The coloured substances which are used as a paint are known as pigments. In order to obtain various pigments, the subtractive method is used for mixing the pigments. Which of the following colour is not absorbed by yellow and blue pigments?

The optical fibre used in signal communication works on which principle?

"Ray of light travels from optically rarer medium to optically denser medium, it moves towards normal and when it travels from optically denser to optically rarer medium it moves away from the normal is known as refraction of light". Which of the following pentagon figures shows the correct refraction of light.

What is lateral shift? Explain the refraction of light through rectangular glass slab with diagram.

Derive $\frac{1}{f}=\frac{1}{v}+\frac{1}{u}$ formula for spherical mirrors.

Name the type of mirror used in side / rearview mirror of a vehicle. Support your answer with reason.

Draw the diagram of image formation by a concave mirror when the object is placed between centre of curvature and focus of the concave. Also state the position, size and nature of the image formed.

An object $4.0\mathrm{}\mathrm{c}\mathrm{m}$ in size, is placed at $25\mathrm{}\mathrm{c}\mathrm{m}\mathrm{}$ in front of a concave mirror of focal length $15$ $\mathrm{c}\mathrm{m.}$ At what distance from the mirror should a screen be placed in order to obtain a sharp image?  Find the nature and the size of the image.