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1. A plane electromagnetic wave travelling in vacuum has a magnetic field given as

B^→(r^→,t) = B_o Cos (10x + ωt)z^.

where x is in meters.

(a) In what direction is the wave propagating?

(b) What is the value of ω? What are the values of the wavelength and frequency of this wave?

(d) Find an expression for the Pointing vector S^→(r^→,t).

(e) If the intensity of the wave is 250 mW/cm², what is the amplitude of the magnetic field B_o?

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Category:- Physics
Reference No.:- M91706912

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