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Electromagnetic Waves question

2020 · 2 Sep · Shift 2 · Q62
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  5. /2020 · 2 Sep · Shift 2 · Q62

Electromagnetic Waves question

2020 · 2 Sep · Shift 2 · Q62

JEE MainPhysicsElectromagnetic WavesMCQ+4 / −1
In a plane electromagnetic wave, the directions of electric field and magnetic field are represented by k^\widehat kk and 2i^−2j^2\widehat i - 2\widehat j2i−2j​, respectively. What is the unit vector along direction of propagation of the wave?
  1. A
    15(i^+2j^){1 \over {\sqrt 5 }}\left( {\widehat i + 2\widehat j} \right)5​1​(i+2j​)
  2. B
    15(2i^+j^){1 \over {\sqrt 5 }}\left( {2\widehat i + \widehat j} \right)5​1​(2i+j​)
  3. C
    12(i^+j^){1 \over {\sqrt 2 }}\left( {\widehat i + \widehat j} \right)2​1​(i+j​)
  4. D
    12(j^+k^){1 \over {\sqrt 2 }}\left( {\widehat j + \widehat k} \right)2​1​(j​+k)
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