A man of height `H` stands in front of a plane mirror Water has been filled upto a height `(3H)/4`. The man can just see his foot in the mirror placed parallel in front of him. What is the refractive index of water?

A man standing in front of a plane mirror finds his image at a distance 6 metre from himself. What is the distance of man from the mirror?

A man standing in front of a plane mirror finds his image at a distance 6 metre from himself. What is the distance of man from the mirror?

A person AB of height 170 cm is standing in front of a plane mirror. His eyes are at height 164 cm. At what distance from P should a hole be made in mirror so that he cannot see his hair?

A man standing in front of a plane mirror finds his image to be at a distance of 6 metre from himself. The distance of man from the mirror is :

Behind a thin converging lens having both the surfaces of the same radius 10cm, a plane mirror has been placed. The image of an object at a distance of 40 cm from the lens is formed at the same position. What is the refractive index of the lens?

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is

A man of height H is standing in front of an inclined plane mirror at an angle theta from horizontal. The vertical separation between man and inclined plane is x. Man can see its complete image in length (H(H+x)"sin"theta)/(H +2x) of mirror . (Given : x = H = 1m and theta = 45^(@) ) If man starts moving with velocity 1 ms^(-1) horizontally, find out length of mirror at t=1s in which he can see his complete image.

A man of height 6 ft wants to see his full image in a plane mirror. The minimum length of the plane mirror required

A man of height H is standing in front of an inclined plane mirror at an angle theta from horizontal. The vertical separation between man and inclined plane is x. Man can see its complete image in length (H(H+x)"sin"theta)/(H +2x) of mirror . (Given : x = H = 1m and theta = 45^(@) ) If man starts moving with velocity sqrt(2)ms^(-1) along inclined plane, find out length of mirror at t = 1s in which he can see his complete image,

A man of height H is standing in front of an inclined plane mirror at an angle theta from horizontal. The vertical separation between man and inclined plane is x. Man can see its complete image in length (H(H+x)"sin"theta)/(H +2x) of mirror . (Given : x = H = 1m and theta = 45^(@) ) If man starts moving with velocity 1 ms^(-1) along vertical, find out length of mirror at t = 1s in which he can see his complete image.