if the power of a lens is -40 then what is its focal length?
Answers
Answered by
1
Answer: The answer will be -1/40
Explanation:
Our answer comes to be 1/-40 because power= 1/focal lenth
Answered by
0
Answer:
-2.5cm
Explanation:
power of lens is -40
Since power is negative its a concave lens
Power = 1 / focal length
-40 = 1 / focal length
focal length = 1 / -40
focal length = -0.025m = -2.5cm
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