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Question

Parallel beam of light is incident on the system of two convex lenses of focal length f1=20 cm and f2=10 cm. What should be the distance between the two lenses so that rays after refraction from both the lenses pass undeviated


  1. 60 cm
  2. 30 cm
  3. 90 cm
  4. 40 cm


Solution

The correct option is B 30 cm
As shown in figure the distance between the lenses should be 30 cm.




 

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