A) \[13.6\,\times {{10}^{6}}\,m/s\]
B) \[1.8\times {{10}^{2}}\,m/s\]
C) \[3.6\,\times {{10}^{8}}\,m/s\]
D) \[1.8\times {{10}^{8}}\,m/s\]
Correct Answer: D
Solution :
The speed of electromagnetic wave in medium is \[\upsilon =\frac{c}{\sqrt{{{\mu }_{r}}{{\varepsilon }_{r}}}}=\frac{3\times {{10}^{8}}}{\sqrt{1.3}\times 2.14}=\frac{3\times {{10}^{8}}}{1.67}\] \[=1.8\times {{10}^{8}}\,m/s\]
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