An EM wave from air enters a medium. The electric fields are ⎥ ⎦ ⎤ ⎢ ⎣ ⎡ ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − πν = t c z x E E 2 cos ˆ 01 1 G in air and )] 2 ( cos[ ˆ 02 2 ct z k x E E − = G in medium, where the wave number k and frequency ν refer to their values in air. The medium is non-magnetic. If 1 r ∈ and

Question

An EM wave from air enters a medium. The electric fields are ⎥ ⎦ ⎤ ⎢ ⎣ ⎡ ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ − πν = t c z x E E 2 cos ˆ 01 1 G in air and )] 2 ( cos[ ˆ 02 2 ct z k x E E − = G in medium, where the wave number k and frequency ν refer to their values in air. The medium is non-magnetic. If 1 r ∈ and 2 r ∈ refer to relative permittivities of air and medium respectively, which of the following options is correct ?

Accepted Answer

2 1 r r ∈ ∈ = 4 1

Related JEE Main General questions