Embibe Experts Solutions for Exercise 1: ICSE-2018

State any two differences between primary rainbow and secondary rainbow.

For any prism, prove that:
$n=\frac{\sin \left({\displaystyle \frac{A+\delta m}{2}}\right)}{\sin \left({\displaystyle \frac{A}{2}}\right)}$
where the terms have their usual meaning.

The deviation produced for violet, yellow and red lights for crown glass are $3.75°$, $3.25°$ and $2.86°$ respectively. Calculate the dispersive power of the crown glass.

Draw a labelled graph of deviation$\left(\delta \right)$ versus angle of incidence $\left(i\right)$ for a prism.

Name the phenomenon due to which the sun appears reddish at sunset.

A ray of light is incident on a prism whose refractive index is $1.52$ at an angle of $40°$. If the angle of emergence is $60°$, calculate the angle of the prism.