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JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
A plane electromagnetic wave in a non-magnetic dielectric medium is given by \(\vec E\, = \,{\vec E_0}\,(4 \times {10^{ - 7}}\,x - 50t)\) with distance being in meter and time in seconds. The dielectric constant of the medium is
- A \(2.4\)
- B \(5.8\)
- C \(8.2\)
- D \(4.8\)
Answer & Solution
Correct Answer
(B) \(5.8\)
Step-by-step Solution
Detailed explanation
Given equation of wave \(\vec{E}=\vec{E}_{0}(4 \times \overrightarrow{10} x-50 t)\) Comparing with general equation of wave, \(\vec{E}=\vec{E}_{0}(k x-w t)\) we get, \(w=50\) rad \(/ s . k=4 \times 10^{-7} m^{-1}\) Thus velocity of wave,…
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