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A converging lens of focal length f(1) i...

A converging lens of focal length `f_(1)` is placed in front of and coaxially with a convex mirror of focal length `f_(2)`. Their separation is d. A parallel beam of light incident on the lens returns as a parallel beam from the arrangement, Then,

A

the beam diameters of the incident and reflected beams must be the same

B

`d=f_(2)-2|f_(2)|`

C

`d=f_(1)-|f_(2)|`

D

if the entire arrangement is immersed in water, the conditions will remain unaltered

Text Solution

Verified by Experts

The correct Answer is:
a.,b.
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