The power of lens is + 2.0 D find its focal length and state the kind of the lens
Answers
Answered by
63
Power of lens = +2D
Power is positive, ∴ the lens is convex
Let focal length be F
Power = 1/F
2 = 1/F
F = 1/2 m
F = 0.5m
Focal length is 0.5m and the lens is convex
Power is positive, ∴ the lens is convex
Let focal length be F
Power = 1/F
2 = 1/F
F = 1/2 m
F = 0.5m
Focal length is 0.5m and the lens is convex
Answered by
11
Explanation:
Power of lens, P= 1/f
P= -2D
f= -1/2 = -0.5 m
A concave lens has a negative focal length. Hence, it is a concave lens.
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