PHYS 157 Lecture Notes - Lecture 10: Black-Body Radiation
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Topics: black-body radiation or thermal radiation, simple applications of, stefan-boltzmann law, wein"s displacement law. We noted that bb emitters shift of shorter wavelength and get brighter overall as the temp increases. Wein"s law: describes the shift in wavelength. Stefan-boltzmann law: describes the increase in total power emitted. Max =550 nm (wavelength corresponding to maximum power) T= (2. 9 x 10^-3 km)/550 x 10^-9 5300 iclicker: The sun mainly gives off (radiates) which two forms of energy: ultraviolet and x-ray, ultraviolet and infrared, visible and ultraviolet d. Rigel (the brightest star in the constellation of orion) is a blue-white colour. What is the temperature of rigel compared to our sun: colder, similar, hotter, you can"t tell directly. How much increase in the radiation power if body temp increase from 37 degrees c to 38 degrees c: 0. 1, 1, 5, 10% Energy emitted by the object at the temperature t 1.
