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The focal length of a convex lens is 30c...

The focal length of a convex lens is `30cm` and the size of the real image is `(1)/(4)th` of the object. Then the object distance is

A

`150cm`

B

`90cm`

C

`60cm`

D

`30cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`(v)/(u)=(1)/(4)impliesu=4v` and `(1)/(u)+(1)/(v)implies(1)/(f)`
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