A) \[60{}^\circ \]
B) \[45{}^\circ \]
C) \[15{}^\circ \]
D) \[30{}^\circ \]
Correct Answer: D
Solution :
[d] For relative permittivity \[=3,\text{ }\varepsilon =3{{\varepsilon }_{0}}\] For relative permeability \[=\frac{4}{3},\mu =\frac{4}{3}{{\mu }_{0}}\] \[\therefore \mu \varepsilon =4{{\mu }_{0}}{{\varepsilon }_{0}}\] \[\sqrt{\frac{{{\mu }_{0}}{{\varepsilon }_{0}}}{\mu \varepsilon }}=\frac{v}{c}=\frac{1}{2}\] \[\sin {{\theta }_{c}}=\frac{1}{2}\] \[\therefore {{\theta }_{c}}=30{}^\circ \]You need to login to perform this action.
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