max (cm) 0.030- 0.025- 0.020- 0.015- 0.010- 0.005- 0 0 50 100 150 T (K) 200 250 300 Question 2: All objects emit electromagnetic radiation whose intensity for the different wavelengths depends on the temperature of the object. Physicists and astronomers often use measurements of this electromagnetic radiation to determine the temperature of an object. The wavelength Amax at which the intensity of this "thermal radiation" is greatest is inversely proportional to the temperature i.e. given by an equation Amax = C/T, for some constant C. The precise relationship is plotted in the graph above. In 1965, microwave radiation peaking at Amax= 0.107cm was discovered coming in all directions from space. To which temperature does this correspond? This is the ambient temperature of the universe, i.e., the temperature that an object in outer space far from any stars will have once it comes to equilibrium. Where did this radiation come from (Google "cosmic microwave background")?
max (cm) 0.030- 0.025- 0.020- 0.015- 0.010- 0.005- 0 0 50 100 150 T (K) 200 250 300 Question 2: All objects emit electromagnetic radiation whose intensity for the different wavelengths depends on the temperature of the object. Physicists and astronomers often use measurements of this electromagnetic radiation to determine the temperature of an object. The wavelength Amax at which the intensity of this "thermal radiation" is greatest is inversely proportional to the temperature i.e. given by an equation Amax = C/T, for some constant C. The precise relationship is plotted in the graph above. In 1965, microwave radiation peaking at Amax= 0.107cm was discovered coming in all directions from space. To which temperature does this correspond? This is the ambient temperature of the universe, i.e., the temperature that an object in outer space far from any stars will have once it comes to equilibrium. Where did this radiation come from (Google "cosmic microwave background")?
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Transcribed Image Text:Amax
(cm)
0.030-
0.025-
0.020-
0.015
0.010-
0.005-
0
0
50
100
150
T (K)
200
250
300
Question 2: All objects emit electromagnetic radiation whose intensity for the different
wavelengths depends on the temperature of the object. Physicists and astronomers often use
measurements of this electromagnetic radiation to determine the temperature of an object.
The wavelength Amax at which the intensity of this "thermal radiation" is greatest is inversely
proportional to the temperature i.e. given by an equation Amax = C/T, for some constant C. The
precise relationship is plotted in the graph above. In 1965, microwave radiation peaking at
Amax= 0.107cm was discovered coming in all directions from space. To which
temperature does this correspond? This is the ambient temperature of the universe, i.e., the
temperature that an object in outer space far from any stars will have once it comes to
equilibrium. Where did this radiation come from (Google "cosmic microwave background")?
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