Question 87: EM waves

Question

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

Accepted Answer

$$c = 3 	imes {10^8}$$ m/sec
$$B = {E \over c} = {{540} \over {3 	imes {{10}^8}}} = 18 	imes {10^{ - 7}}\,T$$

Answer

18 $$	imes$$ 10$$-$$7 T

Answer

54 $$	imes$$ 10$$-$$7 T

Answer

54 $$	imes$$ 10$$-$$8 T

Answer

18 $$	imes$$ 10$$-$$8 T

EM waves

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

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