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

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| Original Question by Dharav 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 L$_1$ or L$_2$ having refracting indices n$_1$ and n$_2$ respectively (n$_2$ > n$_1$ > 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 L$_1$ (C) L$_1$ and immersed in L$_2$ (D) L$_2$ and immersed in L$_1$ Posted by Dharav 14:16, 17 August 2009 (UTC) | What's Up? Latest discussions on the forum Optics-Help Joint Entrance Examination/2000 Screening/Q014 Intermediate image in a compound microscope Joint Entrance Examination/2000 Screening/Q016 Effect of changing width of slits on interference pattern Joint Entrance Examination/2000 Screening/Q030 Hollow Double Convex Lens with variable liquids inside Joint Entrance Examination/2000 Screening/Q032 Divergent beam passsing from a glass slab Joint Entrance Examination/2000 Screening/Q033 Glass slab in water and total internal reflection Physics-Help User:Thewinster/Sandbox User:Thewinster/Sandbox/Forum-Watch Joint Entrance Examination/2000 Screening/Q023 capcitors and dielectric, equivalent capcitance Joint Entrance Examination/2000 Screening/Q027 Wind power turbine relation between wind speed and output power Joint Entrance Examination/2000 Screening/Q030 Hollow Double Convex Lens with variable liquids inside |
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