A mirror is used to produce an image with magnification of . If the distance bet
NextCritical angle of incidence for a pair of optical media is 45°. The refractive i
Nature of image of a real object formed by concave lens is
EasyA plano-convex lens has a central thickness of 2 mm and an aperture diameter of 8 cm. If the speed o
MediumA convex lens of focal length 20 cm is in contact with a concave lens of focal length 40 cm. The pow
MediumIf M.P. of Gallian telescope is 9 & tube length is 80 cm, then fo & fe will be respectively.
MediumA bird is flying 3 m above the surface of water. If the bird is diving vertically down with speed =
MediumA point object O and a mirror M move with velocities of 3 cm s−1 and 4 cm s−1 respectively as shown
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