Problem 34.14 What is the wave\'s wavelength? Express your answer to three signi

Question

Problem 34.14 What is the wave's wavelength? Express your answer to three significant figures and include the appropriate units The magnetic field of an electromagnetic wave in vacuum is Bt = (3.2pT) sin( (9.00 × 106)a wt), where ® is in m and t is in : 1 Value Units Submit My Answors Give Up Incorrect; Try Again; 5 attempts remaining Part B Whial is Ihe wave's Irequecy? Express your answer to three significant figures and include the appropriate units fValueUnils Submit My Answers Give Up Part C What is the wave's electic held amplitude? Express your answer to two significant figures and inelude the appropriate units. Value Units

Explanation / Answer

wavelength = 2pi/k

k = wave number = 9*10^6

wavelength = 2pi/(9*10^6)

wavelength = lambda = 6.98*10^-7 m

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part B

wave frequency f = c/lambda

c = speed of light

wave frequency f = 3*10^8/(6.98*10^-7) = 4.3*10^14 Hz

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part C

Electric field amplitude Eo = B0*c

Bo = 3.2*10^-6

Eo = 3.2*10^-6*3*10^8

Eo = 960 V/m

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