Question

power of convex lens is 0.5 d . find focal length
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Answer 1

Answer:

power=1/f(m)

0.5=1/f

0.5f=1

f=1/0.5

f=2

therefore, focal length= 2

Thank you

Answer 2

Answer:

#balcontest #answerwith quality

Explanation:

Given ..

Power= 0.5 D

we know,

Power=100/f (where f is focal length in centimetres)

=>0.5=100/f

=>f=100/0.5

=>f=200cm or 2 metres (Ans.)

Hey Thanks.!