A radio antenna emits EM waves at a frequency of 100 MHz and intensity of 0.2...

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A radio antenna emits EM waves at a frequency of 100 MHz and intensity of 0.2...

A radio antenna emits EM waves at a frequency of 100 MHz and intensity of 0.2 W/m2. What is the photon density in one cubic meter of the beam?

1.0E12 photons/cubic meter

1.0E16 photons/cubic meter

1.0E20 photons/cubic meter

1.4E31 photons/cubic meter

6.1E32 photons/cubic meter

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Answer 1

Answer #1

Find the energy density and use that to find the required photon density after finding the energy of one photon using the frequency as shown below Energy density is, u . 0.2w 3X108 mis = 667x10-8 5/23 С energy of one photon is Ep = hf = (6-626x10184578/2004 = 6.626 X 10-

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Answer 2

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