The power of lens is 2D (Doiptre) then find its focal length
A) 50 cm
B) 200 cm
C) 100 cm
D)20 cm
Answers
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A)50cm
Because Power(in dioptres)=1/(Focal length in metres)
Answered by
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a)50
Explanation:
Given power (P) = +2D --> lens is biconvex lens focal length (f) = 1/P => f = 1/2D => F = 0.5m Or, f = 50 cm So the lens is biconvex with focal length 50 cm. Answer: Focal length f= 1/p So according to the question power is +2.0 D f= 1/2.0 = 0.5 m In centimeter ...the focal length is 50cm.
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