A ray of light is incident on a plane mirror | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The angle of incidence $i$ is given as $30^\circ$.When a light ray reflects from a plane mirror,the angle of reflection $r$ is equal to the angle

Vedclass · Accepted Answer

$120$

Vedclass · Answer

(D) The angle of incidence $i$ is given as $30^\circ$.When a light ray reflects from a plane mirror,the angle of reflection $r$ is equal to the angle of incidence $i$,so $r = 30^\circ$.The total angle turned by the ray (deviation $\delta$) is given by the formula $\delta = 180^\circ - (i + r)$.Substituting the values,we get $\delta = 180^\circ - (30^\circ + 30^\circ) = 180^\circ - 60^\circ = 120^\circ$.Alternatively,the deviation produced by a plane mirror is $\delta = 180^\circ - 2i = 180^\circ - 2(30^\circ) = 120^\circ$.

$A$ ray of light is incident on a plane mirror at an angle of $30^\circ$. The deviation produced in the ray is....$^\circ$.

Similar Questions

In the figure shown,how many images of the star will an observer at $O$ see?

Light rays fall on a plane mirror and form a real image. Therefore,the incident rays are:

$A$ boy of height $1.5\, m$ with his eye level at $1.4\, m$ stands before a plane mirror of length $0.75\, m$ fixed on the wall. The height of the lower edge of the mirror above the floor is $0.8\, m$. Then:

$A$ light ray makes an angle of $10^o$ with the horizontal. It strikes a plane mirror inclined at an angle $\theta$ to the horizontal,and the reflected ray becomes vertical. What is the value of the angle $\theta$ in degrees?

$A$ ray is reflected in turn by three plane mirrors mutually at right angles to each other. The angle between the incident and the reflected rays is......$^o$

Vedclass Test Series

Exam Paper Generator

Online Exam Module