A) 0
B) 1
C) 2
D) 3
Correct Answer: A
Solution :
\[1\times {{10}^{-6}}=3.14\times {{10}^{-3}}\times 2\times r\times {{10}^{-2}}\] \[r=\frac{{{10}^{-6}}}{3.14\times {{10}^{-5}}\times 2}\] \[=0.016m=1.6\,\,cm\] \[\frac{{{C}_{1}}}{{{C}_{2}}}=\frac{\sin i}{\sin r}\] \[\frac{3\times {{10}^{8}}}{{{c}_{2}}}=\frac{\sin {{45}^{o}}}{\sin {{30}^{o}}}=\frac{0.707}{0.5}\] \[{{C}_{2}}=\frac{3\times {{10}^{8}}\times 0.5}{0.707}\]
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