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A parallel beam of light is incident on the system of two convex lenses of focal length `f_(1)=20cm` and `f_(2)=10cm` . What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated?

A

60cm

B

30cm

C

90cm

D

40cm

Text Solution

Verified by Experts

The correct Answer is:
b.
As shown figure . The distance between the lenses should be 30cm.
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