![]() a) Determine how much energy Betelgeuse radiates each second. The supergiant star Betelgeuse has a surface temperature of about 2900 K and a radius of 3 x 1011 m. Where V=Stefan-boltzmann constant : V=5.67 x 10Ȉ 2 4 P. ![]() How does the energy radiated by an object change if its Be sure to label the axes and indicate which curve represents which temperature.ħKH6WHIDQ%ROW]PDQQ/DZ RI5DGLDWLRQ relates intensity of radiation to the temperature of the bodyġ. Use the axes at right to sketch the emission spectra for a black-body radiating at low and high temperature. Emitted wavelength with highest intensity (Ȝmax ) is related to. Not all wavelengths of light will be emitted with equal intensity. emit a continuous spectrum (PLVVLRQ6SHFWUDIRU%ODFN%RGLHV 1. %ODFNȎRG\UDGLDWLRQ: radiation emitted by a “perfect” emitter When heated, a low-pressure gas will. absorb all incoming radiation, not reflect any, then radiate all of it. When the object is in thermal equilibrium with its surroundings,Īn object that acts as a “black-body” will. ![]() Factors that affect how an object absorbs, emits (radiates), and reflects EM radiation incident on them:ġ) Nature of the surface: material, shape, texture, etc.Ī) Light-colored or silvery objects: absorb little energy, reflect most energyī) Dark objects: absorb most energy, reflect little energy
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