A person has `D` cm wide face and his two eyes are separated by d cm. The minimum width of a mirror required for the person to view his complete face is

A boy 1.5 m tall with his eye level at 1.38 m stands before a mirror fixed on a wall. The minimum length of mirror required to view the complete image of boy is

A person wants to see AB part of his image. His eye level is at 1.8m above the ground. If he uses minimum size of mirror required for this, find the height of the lowest point of mirror above the ground.

A person wants to see AB part of his image. His eye level is at 1.8m above the ground. If he uses minimum size of mirror required for this, find the height of the lowest point of mirror above the ground.

A man 160 cm height stands in fromt of a plane mirror . His eyes are at a height of 150 cm from the floor. Then the minimum length of the plane mirror for him to see his full length image is -

A person has a defect of eye vision. His near point is 40 cm. It means …

A one eyed demon has a circular face of radius a_(0) = 10 cm . The eye is located at the centre of the face. At what distance from his face he must hold a convex mirror of 5 cm aperture diameter so as to see his complete face? Focal length of the mirror is 10 cm.

The height of a person is 170cm. What is the minimum length of a plane mirror in which he can see his full image (in cm)?

A person standing 1 m in front of a plane mirror approaches the mirror by 40 cm . The new distance between the person and his image in the plane mirror is