Joint Entrance Examination/2000 Screening/Q030 Hollow Double Convex Lens with variable liquids inside

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Original Question by Dharav talk

Here's the question...

A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids L1 or L2 having refracting indices n1 and n2 respectively (n2 > n1 > 1). The lens will diverge a parallel beam of light if it is filled with

  • (A) air and placed in air
  • (B) air and immersed in L1
  • (C) L1 and immersed in L2
  • (D) L2 and immersed in L1

Posted by Dharav talk 14:16, 17 August 2009 (UTC)



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