Question: Q. 11. Under what condition does a biconvex lens of glass having a certain refractive index act as a plane glass sheet when immersed in a liquid ?
[Delhi I, II, III 2012]
Solution:
Ans. When the refractive index of glass is equal to the refractive index of the liquid.
(Alternatively, when $\mu_{\mathrm{L}}=\mu_{\mathrm{o}}$ )
1
[CBSE Marking Scheme 2012]
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