A lens has a power of +2.5D.
Find its focal length and the
length and the type of the lens
Answers
Answered by
4
power = +2.5 D
now , focal length = 1/D
=1/2.5
= 0.4
= 40 cm
Explanation:
as the lens have +D it's convex lens so it's nature is converging
Answered by
5
Answer:
The answer is as follows:-
Explanation:
Power of lens= __1__
f (focal length)
+2.5 = __1__
f
f =__1__
2.5
f = 0.4
therefore focal length is 0.4 cm
as focal length is positive
it means the type of lens is convex lens...
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