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An equiconvex lens is made from glass of...

An equiconvex lens is made from glass of refractive index 1.5. If the radius of each surface is changed from 5cm to 6cm, then the power

A

remains unchanged

B

increases by 3.33D

C

decreases by 3.33D

D

decreases by 5.5D

Text Solution

Verified by Experts

The correct Answer is:
c.
`P=(1.5-1) ((200)/(5))=20D`
`P^(')=(1.5-1)((200)/(5)) = 16.67D`
Decrease in power ` = 20D-16.67D=3.33D`
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