An EM wave from air enters a medium. The electric fields are 
in air and 
in medium, where the wave number k and frequency υ refer to their values in air. The medium is non-magnetic. If 
and 
refer to relative permittivities of air and medium respectively, which of the following options is correct ?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Sol. C = Speed in air
V = Speed in medium
(Non-magnetic)
⇒ 
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