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The electric field associated with an EM wave in vacuum is given by $\vec{E} = 40 \cos (kz - 6 x 10^{8} t) \hat{i}$ , where E, z and t are in volt/m, meter and seconds respectively. The value of wave vector k is

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2 m–1

0.5 m–1

6 m–1

3 m–1

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detailed solution

Correct option is A

K=2πλ=2πCn=2πnC=ωC=6 x 1083 x 108=2 m-1

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The electric field associated with an EM wave in vacuum is given by E→=40cos kz-6 x 108ti^, where E, z and t are in volt/m, meter and seconds respectively. The value of wave vector k is

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Ready to Test Your Skills?

free study material

The electric field associated with an EM wave in vacuum is given by $\vec{E} = 40 \cos (kz - 6 x 10^{8} t) \hat{i}$ , where E, z and t are in volt/m, meter and seconds respectively. The value of wave vector k is