Field of View

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. 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. An object $M$ is placed at a distance of $3\text{m}$ from a mirror kept at some height with its lower end at $2\text{m}$ from ground as shown in the figure. There is a person at a distance of $4\text{m}$ from the object. The ratio of minimum eye level and maximum eye level of the person required to see the image of the object $M$ will be :

1. $3:4$
2. $1:2$
3. $2:3$
4. $1:3$