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Let f(v) and f(r) are the focal lengths ...

Let `f_(v)` and `f_(r)` are the focal lengths of a convex lens for violet and red lights respectively. If `F_(v)` and `F_(r)` are the focal lengths of a concave lens for violet and red light respectively, then

A

`f_(V) lt f_(R ) and F_(V) gt F_(R )`

B

`f_(V) lt f_(R ) and F_(V) lt F_(R )`

C

`f_(V) gt f_(R ) and F_(V) gt F_(R )`

D

`f_(V) gt f_(R ) and F_(V ) lt F_(R )`

Text Solution

Verified by Experts

The correct Answer is:
A
For a convex lens `f_(R ) gt f_(V) or f_(V) lt f_(R )`
For a concave lens, focal length is negative and
`F_(R ) lt F_(V) or F_(V) gt F_(R )`
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