ch33-p025 - 25. (a) Since c = f , where is the wavelength...

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(d) The magnetic field amplitude is 6 8 300V/m 1.0 10 T. 2.998 10 m/s m m E B c == = × × (e) G B must be in the positive z direction when G E is in the positive y direction in order for G G E B × to be in the positive x direction (the direction of propagation). (f) The intensity of the wave is 2 2 22 2 8 0 (300V/m) 119W/m 1.2 10 W/m . 2 2(4 H/m)(2.998 10 m/s) m E I c µπ −7 = × ×10 × (g) Since the sheet is perfectly absorbing, the rate per unit area with which momentum is delivered to it is I / c , so dp dt IA c × () ( . ) . . 119 2 0 2 998 10
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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