Name the type of lens if its power is - 20D.
find the focal length of the lens.
Answers
Answered by
41
Hi Mate!
It is a concave type of lens.
It's focal length is given by:-
f = 1/D
f = 1/-20
f = 0.05m
It is a concave type of lens.
It's focal length is given by:-
f = 1/D
f = 1/-20
f = 0.05m
Answered by
13
Answer:
If power is -20 d then r/2 -20/2 = -10
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