A) suffer total internal reflection in both cases (a) and (b)
B) suffer total internal reflection in cases (b) only
C) have partial reflection and partial transmission in case (b)
D) have 100% transmission in case (a)
Correct Answer: A
Solution :
Refractive index \[=\mu =\frac{c}{v}=\frac{3\times {{10}^{8}}}{3\times {{10}^{-2}}/0.2\times {{10}^{-9}}}\] \[=\frac{{{10}^{8}}\times 0.2\times {{10}^{-9}}}{{{10}^{-2}}}=2\] From total internal reflection \[=\sin \,{{i}_{C}}=\frac{1}{\mu }=\frac{1}{2}\] So, \[{{i}_{C}}={{30}^{0}}\] For total internal reflection \[i>{{i}_{c}}\] So for second case, total internal reflection is possible.You need to login to perform this action.
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