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In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by \(\overset{^}{k}…

Q1

In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by \(\overset{^}{k}\) and \(2\overset{^}{i}-2\overset{^}{j}\) respectively. What is the unit vector along the direction of propagation of the wave?

a

\(\frac{1}{\sqrt{5}}(\overset{^}{i}+2\overset{^}{j})\)

b

\(\frac{1}{\sqrt{2}}(\overset{^}{i}+\overset{^}{k})\)

c

\(\frac{1}{\sqrt{2}}(\overset{^}{i}+\overset{^}{j})\)

d

\(\frac{1}{\sqrt{5}}(2\overset{^}{i}+\overset{^}{j})\)

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