the convex lens of focal length 40 cm is in contact with a convex lens of focal length 25 CM. find the power of the combination
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40cm = 0.4m
Power = 1/0.4 = +2.5D
25cm = 0.25m
Power = 1/0.25 = +4.0D
Power of combination
= 4 + 2.5 = +6.5D
Power = 1/0.4 = +2.5D
25cm = 0.25m
Power = 1/0.25 = +4.0D
Power of combination
= 4 + 2.5 = +6.5D
muskanbabu2816:
what is formula for finding power
1/focal length(in meters)
thanks
welcome
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