An EM wave is travelling in (hati+hatj)/...

An EM wave is travelling in `(hati+hatj)/sqrt(2)` direction. Axis of polarization of EM wave is found to be `hat k` . Then equation of magnetic field will be

`(hati+hatj)/sqrt(2) cos[omega t+k((hati+hatj)/sqrt(2))]`

`(hati-hatj)/sqrt(2) cos[omega t-k((hati+hatj)/sqrt(2))]`

`(hati-hatj)/sqrt(2) cos[omega t+k((hati+hatj)/sqrt(2))]`

`hatk cos[omega t+k((hati+hatj)/sqrt(2))]`

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