JEE PHYSICS MCQ: RAY OPTICS

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Application +4 | -1

A combination of two thin lenses with focal lengths

{f_1}

and

{f_2}

respectively forms an image of distant object at distance

60\,\,cm

when lenses are in contact. The position of this image shift by

30\,\,cm

towards the combination when two lenses are separated by

10\,\,cm

. The corresponding values of

{f_1}

and

{f_2}

are

View answer and explanation

Correct option: B

20\,\,cm, - \,30\,\,cm

Option B (

20\,\,cm, - \,30\,\,cm

) is correct because it satisfies the lens combination equations for both the contact and separated lens scenarios.

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