the ratio of power of two convex lens is 2:1 . when these are placed in contact then power of combination is 6d. choose the correct option-----
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0
Answer:
A and B
Explanation:
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3
Answer:
both A and B are correct
Explanation:
6D = 100/6 f
focal length = 50/3 cm
let focal lengths be x , 2x
so,
as it is convex lens focal length will be positive.
1/x + 1/2x = 3/50
6x = 150
x = 25 POWER = 100/25 = 4D
2x = 50 POWER = 100/50 = 2D
Power of lenses are 2D and 4D
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