Field of View

Q. A boy of height $1.5\text{m}$ with eye level at $1.4\text{m}$ stands before a plane mirror of length $0.75\text{m}$ fixed on the wall. The height of the lower edge of the mirror above the floor is $0.8\text{m}$. If the boy wants to see his feet in the mirror, then select the correct option.

1. He will be able to see his feet
2. He will not be able to see his feet
3. He will be able to see his feet depend on his distance from mirror
4. Data insufficient

Q. A point source of light $S$ is placed at a distance $L$ in front of the centre of plane mirror of length$\left(d\right)$. A man walks in front of the mirror along a line parallel to the mirror, at a distance $2L$ as shown below. The distance over which the man can see the image of the light source in the mirror is

1. $\frac{d}{2}$
2. $d$
3. $3d$
4. $2d$

Q.

Figure shows an overhead view of a corridor with a plane mirror M mounted at one end. A burglar B sneaks along the corridor directly toward the center of the mirror. If d = 3.0 m, how far from the mirror will she be when the security guard S first sees her in the mirror?

1. the guard will never be able to see her

2. $\frac{d}{2}$

3. $\frac{3d}{2}$

4. $d$