Introduction To Health Physics
Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 3, Problem 3.27P

(a)

To determine

The energy of photon in million eV and in Joules.

(b)

To determine

Wavelength of the photon in angstrom units.

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How many photons are contained in a beam of electromagnetic radiation of total power 180W if the source is (a) an AM radio station of 1100kHz (b) 8.0-nm x-rays and (c) 4.0-MeV gramma rays?
An infrared photon has a frequency of 8.3 E12 Hz. What is the energy of this photon, expressed in meV (milli electron-volt)? I tried the formula E=hf => E= (6.63E-34)(8.3E12) = 5.5029E-21 and then converted to meV as 3.43E22, but it's still wrong.
A photon has an energy of 1.9 meV (milli electron Volt). What is the wavelength of this photon, expressed in micrometers? Keep four significant digits. And the answer is NOT 6.543
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