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solve question number 29 & 30 of paragraph which is considered as 1 question
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Asked by sarveshvibrantacademy | 28 Apr, 2019, 03:15: PM
answered-by-expert Expert Answer
Qn. 29
for refraction at spherical surface we have, begin mathsize 12px style n subscript 2 over v space minus space n subscript 1 over u space equals space fraction numerator n subscript 2 minus n subscript 1 over denominator R end fraction end style ...................(1)
here n2 = μ ,  n1 = 1,  v = 2R,  u = x = -2R (sign convention)
 
Hence eqn.(1) is written as ,   begin mathsize 12px style fraction numerator mu over denominator 2 R end fraction space minus space fraction numerator 1 over denominator negative 2 R end fraction space equals space fraction numerator mu minus 1 over denominator R end fraction end style  ...................(2)
we get μ = 3 from eqn.(2)
 
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Qn.30
 
here n2 = μ ,  n1 = 1,  v = 2R,  u = x = ∞
 
Hence eqn.(1) is written as ,   begin mathsize 12px style fraction numerator mu over denominator 2 R end fraction space space equals space fraction numerator mu minus 1 over denominator R end fraction end style  .......................(3)
we get μ = 2 from eqn.(3)
Answered by Thiyagarajan K | 28 Apr, 2019, 04:27: PM

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