The electric field associted with an electromagnetic wave in vacuum is given by `vecE=hati 40 cos(kz=6xx10^(8)t)`, when `E`, `z` and `t` are in volt/m metre and second respectivelyfind the wave vector.A. `6m^(-1)`B. `3m^(-1)`C. `2 m^(-1)`D. `0.5 m^(-1)`

The electric field associted with an electromagnetic wave in vacuum is

1.	The electric field associted with an electromagnetic wave in vacuum is given by `vecE=hati 40 cos(kz=6xx10^(8)t)`, when `E`, `z` and `t` are in volt/m metre and second respectivelyfind the wave vector.A. `6m^(-1)`B. `3m^(-1)`C. `2 m^(-1)`D. `0.5 m^(-1)`
Answer» Correct Answer - C Equation of Electromagnetic wave is `E=E_(0) cos (kz-omega t)` and speed of EM wave `V=(omega)/(k)` By comparing `k=omega//v=(6xx10^(8))/(3xx10^(8))=2 m^(-1)` is the wave vector.

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The electric field associted with an electromagnetic wave in vacuum is given by `vecE=hati 40 cos(kz=6xx10^(8)t)`, when `E`, `z` and `t` are in volt/m metre and second respectivelyfind the wave vector.A. `6m^(-1)`B. `3m^(-1)`C. `2 m^(-1)`D. `0.5 m^(-1)`

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