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An object starts moviing at an angle of ...

An object starts moviing at an angle of `45^(@)` with the principal axis as shown in figure. In front of a biconvex lens of focal length `+10cm` . If `theta` denotes the angle at which image starts to move with principal axis, then

A

`theta=(3pi)/(4)`

B

`theta=(pi)/(2)`

C

`theta=(pi)/(4)`

D

`theta=-(pi)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
d.
Object is at `2f`, so image is also formed at 2f.
`V_(ly)=V_(oy)` and `V_(lx)=V_(Ox)`
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