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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

(a) Find the energy in joules and eV of photons in radio waves from an FM station that has a 90.0-MHz broadcast frequency. (b) What does this imply about the number of photons per second that the radio station must broadcast?

To determine

(a)

The energy in joules and eV of photons in radio waves from an FM station that has a 90 MHz broadcast frequency.

Explanation

Given info:

  f=90 MHz

  h=6.63×1034 Js

Formula used:

For energy in photon in radio waves, the relation between energy and frequency is

  Ehf

Calculation:

Substituting the given values of frequency in relation with time, we get

  f=1T

Substituting the values, we get

  f=9×107pulses/s l

Now energy of radio waves is

  E6.63×1034×9×107 JE5

To determine

(b)

This imply about the number of photons per second that the radio station must broadcast.

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