A light ray travels from denser to rarer. Plot between $\delta$ (deviation) vs i (incidence angle) is shown in figure, then which is the correct relation between Y & X?

Q. Which of the following graphs correctly represents the variation of angle of deviation $\left(\delta \right)$ versus angle of incidence $\left(i\right)$ for a light ray travelling from a denser to rarer medium?

Q. A light ray travels from optically denser medium to optically rarer medium, if the angle of incidence and refraction at point of incidence are $\angle i$ and $\angle r$ respectively, then find the angle of deviation in terms of $\angle i$ and $\angle r$.

Q. Mark the correct statement/statements:
a) Angle of incidence is equal to angle of refraction
b) Angle of refraction is smaller than angle of incidence when light ray travels from rarer medium to denser medium.
c) Angle of refraction is greater than angle of incidence when light ray travels from denser medium to rarer medium.

Q. What is the angle of deviation of a light ray when it enters from a rarer medium to a denser medium? Take angle of incidence = ${\theta }_1$ and angle of refraction = ${\theta }_2$.

Q. A ray incident on a plane mirror at angle i and produced a net deviation of δ between incident ray and reflected ray. Choose the correct graph between the deviation (δ) and incident angle (i).