A convex lens of focal length 30 cm and a concave lens of 10 cm focal – McqOptions

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1.	A convex lens of focal length 30 cm and a concave lens of 10 cm focal length are placed so as to have the same axis. If a parallel beam of light falling on convex lens leaves concave lens as a parallel beam, then the distance between two lenses will be
A.	40 cm
B.	30 cm
C.	20 cm
D.	10 cm
Answer» D. 10 cm

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