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A three times magnified image of a candle flame is to be projected on a wall which type of lens required for this purpose if the candle is at a distance of 6m from the wall calculate the focal length of the lens

Posted by Simran Singhania 7 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Shagun Vishwakarma 7 years, 2 months ago

m = v/u

3 = 6/u

u = 2

By lens formula

1/u - 1/v = 1/f

1/2 - 1/6 = 1/f

3 - 2/6 = 1/f

1/6 = 1/f

f = 6 cm

0Thank You

ANSWER

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