Question

Combination of lenses.. can you solve it?

Answer 1

what is ur question

Answer 2

hello mate..

for combinations if lenses u need to combine power of each lens if there are kept regularly without any space as follow

p = p1 + p2 + .....

1/F = 1/ F1 + 1/F2 ...

BUT if they are kept with space then we need to use this formula

p = p1 + p2 -d×p1×p2 where d is distance between lenses..

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