Consider three objects with the same temperature, but with radii of Bob = 1000 meters, Patrick = 2000 meters and Gary = 4000 meters. Which has the largest luminosity and which has the smallest? Why? How many times bigger is the largest luminosity than the smallest? What do we know about the color of the objects?
2007-03-29 08:04:55 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Physics
At equal temperatures, the watt-density radiated by each of the three objects is the same. The luminosity, being the total wattage emitted is proportional to the square of the diameter of the object. The luminosity of the object Gary is 16 times the luminosity of the object Bob, with the luminosity of object Patrick lying in the middle ( 4x Bob).
The observed color of the objects will be the same, as the emission spectra is the same.
2007-03-30 09:45:46 · answer #1 · answered by Helmut 7 · 0⤊ 0⤋