Size of Mirror

Q. What should be the minimum height of the mirror so that a person can see the full wall of height h behind him? (Assume the man to be at the centre of the wall and the mirror.)

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

Q. A person $1.6\text{m}$ tall is standing at the centre between two walls $3\text{m}$ high. What is the minimum size of the plane mirror fixed on the wall in front of him, if the person wants to see the image of the full height of the wall behind him?

1. $0.8\text{m}$
2. $1\text{m}$
3. $1.5\text{m}$
4. $2.3\text{m}$

Q. What is the minimum length of the mirror required to visualise the complete image of the body of a person of height H.

1. $\frac{H}{2}$
2. $\frac{H}{3}$
3. 3H
4. Cannot be formed

Q. A point object $O$ is placed in front of a plane mirror as shown in the figure. In order to see the image in mirror, the region where a person must place his eyes is best represented as:

1. 
2. 
3. 
4. 

Q. A point object $O$ is placed in front of a plane mirror as shown in the figure. In order to see the image in mirror, the region where a person must place his eyes is best represented as:

1. 
2. 
3. 
4.