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A point object is placed at 30 cm from a...

A point object is placed at 30 cm from a convex glass lens `(mu_(g) = (3)/(2))` of focal length 20 cm. The final image of object will be formed at infinity if

A

another concave lens of focal length 60 cm is placed in contact, with the previous lens

B

another convex lens of focal length 60 cm is placed at a distance of 30 cm from the first lens.

C

the whole system is immersed in a liquid of refractive index `4/3`.

D

the whole system is immersed in a liquid of refractive index `9/8`.

Text Solution

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The correct Answer is:
A, D
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Knowledge Check

  • A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at

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