Ray Optics and ...

An object is initially at a distance of 100 cm from a plane mirror. If the mirror approaches the object at a speed of 5 cm/s. Then after 6 s the distance between the object and its image will be

Two mirrors are placed perpendicular to each other. A ray strikes the first mirror and after reflection from the first mirror it falls on the second mirror. The ray after reflection from second mirror will emerge

A person is in a room whose ceiling and two adjacent walls are mirrors. How many images are formed?

If an object is placed unsymmetrically between two plane mirrors, inclined at the angle of 60⁰ , then the total number of images formed is

In image formation from spherical mirrors, only paraxial rays are considered because they

A concave mirror of radius of curvature 20 cm forms image of the sun. The diameter of the sun subtends an angle 1 °on the earth. Then the diameter of the image is (in cm)

A convex mirror has a focal length f . A real object, placed at a distance f in front of it from the pole, produces an image at

A convex mirror has a focal length = 20 cm. A convergent beam tending to converge to a point 20 cm behind convex mirror on principal axis falls on it. The image if formed at

An object is placed at a distance u from a concave mirror and its real image is received on a screen placed at a distance of v from the mirror. If f is the focal length of the mirror, then the graph between 1/v versus 1/u is

An infinitely long rod lies along the axis of a concave mirror of focal length f. The near end of the rod is at a distance u >f from the mirror. Its image will have a length