A thin glass (refractive index 1.5) lens has optical power of -5D in air. It’s optical power in a liquid
medium with refractive index 1.6 will be
(A) 25D (B) -25D
(C) 1D (D) None of these
PLEASE EXPLAIN ALSO.
Answers
Answered by
0
NONE OF THESE AS BY SOLVING IT WE GET ANSWER AS O.5D
Answered by
0
Correct option is (D) None of these
P=(u2/u1 - 1) (1/R1 - 1/R2)
-5= (1.5/1 - 1) ( 1/R1-1/R2)
-5/0.5 = 1/R1 - 1/R2
or 1/R1 - 1/R2 = -10
Taking P=(1.5/1.6 - 1) (-10)
= (-0.1) (-10)/1.6
=5/8 D
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