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Question

Physics Question on Electromagnetic waves

In E\vec{E} and K\vec{K} represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by:(ω(\omega- angular frequency):

A

1ω(K×E)\frac{1}{\omega}(\vec{K}\times\vec{E})

B

ω(E×K)\omega(\vec{E}\times\vec{K})

C

K×E\vec{K}\times\vec{E}

D

ω(K×E)\omega(\vec{ K } \times \vec{ E })

Answer

1ω(K×E)\frac{1}{\omega}(\vec{K}\times\vec{E})

Explanation

Solution

The correct answer is (A) :1ω(K×E)\frac{1}{\omega}(\vec{K}\times\vec{E})
Magnetic field vector will be in the direction of K^×E^
magnitude of B=CE​=ωK​E
Or B=ω1​(K×E)