A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with a distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then the distance d in cm will be
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8
Answer:
option b
Explanation:
distance between is 20−5=15
as image formed by lens must be at the focus of the second lens to get final image at infinity.
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Answered by
1
Answer:
option b
Explanation:
distance between is 20−5=15
as the image formed by the lens must be at the focus of the second lens to get a final image at infinity.
HOPE IT HELPS YOU
IF IT HELPS THEN PLZ MARK AS BRILLIANT
THANK YOU
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