2. A convex lens has a focal length of 50 cm.
calculate its power?
(2 Points)
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2. A convex lens has a focal length of 50 cm.
calculate its power?
(2 Points)
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POWER IS EQUAL TO RECIPROCAL OF FOCAL LENGHT
P=1/f
p=1/50
Explanation:
Convex (so focal length is positive)
given : f= +50 or +50 x 10^-2
to find: p
formula =p =1/f
p=1/50x10^-2
p=100/50
p= 2
therefore p=2dioptre or 2D.
Glad I could help you.
Thanks.