Light wave travelling in air along x-direction is given by Ey = $540sin\pi \times 10^4\left(x-ct\right)V{m}^{-1}.$ The, the peak value of magnetic field of wave will be (Given c = 3 × 10⁸ms^-1)

<p><math><mrow><mi>c</mi><mo>=</mo><mfrac><mrow><msub><mrow><mi>E</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow><mrow><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></mfrac><mo>⇒</mo><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>=</mo><mfrac><mrow><msub><mrow><mi>E</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow><mrow><mi>c</mi></mrow></mfrac><mo>=</mo><mfrac><mrow><mn>5</mn><mn>4</mn><mn>0</mn></mrow><mrow><mn>3</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>8</mn></mrow></msup></mrow></mfrac><mo>=</mo><mn>1</mn><mn>8</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>8</mn></mrow></msup><mi>T</mi></mrow></math></p>

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