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Question
The power of a lens is + 2.0 D. Find its focal length and state the kind of the lens.
The power of a lens is + 2.0 D. Find its focal length and state the kind of the lens.
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Solution
P=+0.2D
F=1/P
=1/2
0.5 m or 50 cm
power is positive so convex lens
F=1/P
=1/2
0.5 m or 50 cm
power is positive so convex lens
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