Question

You are provided with two convex lenses of focal length 15 cm and 25 cm, respectively. Which of the
two is of larger power? Give reason for your answer.
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Answer 1

Convex lens of focal length 15cm is of larger power.

REASON:--

POWER = 1÷focal length

as 1/15 is greater than 1/25

so my answer is justified.

Answer 2

Answer:   R = y/e (x+y)

Explanation: