An Introduction to Thermal Physics
An Introduction to Thermal Physics
1st Edition
ISBN: 9780201380279
Author: Daniel V. Schroeder
Publisher: Addison Wesley
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Chapter 7.4, Problem 42P

(a)

To determine

The total energy of the electromagnetic radiation.

(b)

To determine

The plot of the spectrum of radiation as a function of photon energy.

(c)

To determine

The fraction of the total energy is in the visible region of the spectrum.

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To measure temperatures, physicists often use the variation of intensity of EM radiation emitted by an object. The wavelength at which the intensity is greatest is given by the equation:                                           λmaxT = 0.2898 cm.K where λmax is the wavelength of greatest intensity and T is the temperature of the object in kelvins. In 1965, microwave radiation peaking at λmax = 0.107 cm was discovered coming in all directions from space. To what temperature, in a) K    b) °C   c) °F, does this wavelength correspond?
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