ASTR BC 1754y Lecture Notes - Lecture 7: Black-Body Radiation, Minute And Second Of Arc, Escape Velocity
26 Aug 2016
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Two stars, a and b, have temperatures of 12000k and 6000k respectively. Draw in one figure the relative intensity of both stars as function of wavelength. Now add to the figure the intensity coming from the statue of. Intensity on the y axis, wavelength on the x axis. Blackbody radiation is radiation that energy emits at all wavelengths. If you draw intensity as a function of wavelength, you get a curve with a peak towards the left. If it was a curve for 12000k, it has a higher peak and shorter wavelength than 6000k. The 6000k wavelength is twice as long as the 12000k. The intensity of the 12000k is 16 times more than the 6000k. You get two peaks, one at the same point as the peak of the 6000k (but lower intensity) and one peak further to the right. Considering the same two stars, if star a (12000k) is twice as far away as star b (6000k).
