ASTA01H3 Lecture 7: Lecture 7 and 8 in class notes

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21 Jan 2011
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The frequencies and: wavelengths corresponding to peak emission are marked, a cool, invisible galactic gas cloud called rho ophiuchi. At a temperature: of 60 k, it emits mostly low-frequency radio radiation, a dim, young star (shown red in the inset photograph) near the center of, the orion nebula. Centauri, as: observed by a telescope aboard a space shuttle. At a temperature of: 60,000 k, these stars radiate strongly in the ultraviolet. (harvard college, observatory; j. moran; aura; nasa, wiens law www. notesolution. com o. T in kelvins: stefan blotzman law o, where sigma=5. 67x10-8w/m 2k 4, blackbody curves can be used as thermometers to determine the temperature ob distant objects, the sun"s surface temperature is about 5800k. What is the wavelength of the peak radiation of a blackbody with this temperature. by stef law the solar energy flux per unit time is. surface area of a sphere with sun radius is r=6. 96x105 km.