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1.AnswerthefollowingQuestions:12 The object is placed at 10cm from the optical centre of the lens having focal length 12em findimage distance.

Answer»

For a lens, the lens formula is given as :

1/f = 1/v - 1/u

given, f = focal length = 12 cm

u = object distance = 10 cm

v = image distance = ?

hence,

1/12 = 1/v - 1/10

=> 1/v = 1/12 + 1/10

=> 1/v = 22/120

=> v = 120/22 = 5.45 cm

Hence the image will be formed at a distance of 5.45 cm.



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