Question

v= -10/3cm. u= -10cm. find f=? by lens formula..​

Answer 1

Answer:

so the answer is 2 centimetres

Answer 2

-5 cm

1/f = 1/v - 1/u ( by lens formula)

=> 1/f = (-3/10) + (1/10)

=> 1/f = -2/10

=> 1/f = -1/5

=> f = -5

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