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CBSE Class 10 Answered

An object is placed in front of a concave mirror of focal length 20cm .The image formed is 3 times
Asked by | 03 May, 2008, 05:29: PM
Expert Answer

use the formula m = -v/u this will give two values of v interms of u

now use the formula 1/v + 1/u = 1/f

put the values of f , v interms of u and calculate value of u which is ans. for real image use v = +3u for virtual image use v=-u this will give two positions

Answered by | 28 Jun, 2008, 12:14: PM
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