Question

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100% until Sunday, April 22 at 11:59 PM

Electromagnetic Waves 2

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A plane monochromatic electromagnetic wave with wavelength ? = 2.1 cm, propagates through a vacuum. Its magnetic field is described by

B? =(Bxi^+Byj^)cos(kz+?t)B?=(Bxi^+Byj^)cos?(kz+?t)

where B_x = 2 X 10^-6 T, B_y = 4.9 X 10^-6 T, and i-hat and j-hat are the unit vectors in the +x and +y directions, respectively.

1)

What is f, the frequency of this wave?GHz

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Your submissions:

14.29

Computed value:

14.29

Submitted:

Thursday, April 19 at 8:31 PM

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Your answer has been judged correct; the exact answer is: 14.2857142857143.

2)

What is I, the intensity of this wave? W/m²

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3)

What is S_z, the z-component of the Poynting vector at (x = 0, y = 0, z = 0) at t = 0? W/m²

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4)

What is E_x, the x-component of the electric field at (x = 0, y = 0, z = 0) at t = 0?V/m

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Answer 1