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Two thin lenses may be combined so as to...

Two thin lenses may be combined so as to

A

produce diminished image.

B

produce maginifed image.

C

produce magnified image.

D

cancel image and no image is formed.

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Two thin lenses have a combined power of +9D.When they are separated by a distance of 20 cm, then their equivalent power becomes +27/5 D. Their individual powers (in dioptre) are

    A
    1,8
    B
    2,7
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  • Two thin lenses, aone convex of focal length 10 cm and other concave lens are kept in contact to form a composite lens of focal length 13 cm . If the combination acts as a converging lense the focal length of second lens is

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    `-43.33` cm
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    D
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  • When two thin lenses are kept in contanct, the focal length of the combination is

    A
    the geometricamean of the two focal lenghts.
    B
    the same as the larger focal length
    C
    gretter than either focal length
    D
    smaller than either focal length

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