A C Sehgal Solutions for Exercise 3: EXERCISES

Is the image formed by a plane mirror exactly of the same size as the object?

The image formed by a plane mirror is always erect.

A ray incident on a plane mirror is reflected in a direction such that the angle between the incident and the reflected ray is $90°$. What are the angles of incidence and reflection$?$

If all objects around us were to reflect light in a regular way, what problems might we face$?$

A boy is standing at a distance of $4 \mathrm{m}$ in front of a mirror. He moves $2 \mathrm{m}$ towards the mirror. In which direction will the image move$?$

(Choose one from$:$ Towards the mirror $/$ Away from the mirror)

In the figure shown below, $\mathrm{MN}$ is a plane mirror. $\mathrm{W}, \mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ are four children. Mark the positions of the reflections of $\mathrm{W},\hspace{0.17em}\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the mirror. Answer the following questions.

a. Which child/children can see their own images in the mirror$?$

b. Can child $\mathrm{W}$ see the images of $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the mirror$?$

If the angle of incidence of a ray on a plane mirror is $60°$, what is the angle of reflection?

The angle of incidence of a ray on a plane mirror is the angle that the ray makes with the mirror at the point of incidence.