2006-09-27 06:43:26 · 5 answers · asked by vidlook 1 in Science & Mathematics ➔ Physics
for two stars of same size the colour of them will tell us which one is more hot.red appearing star will be least hot and that of blue colour will be the hottest.
2006-09-27 06:49:35 · answer #1 · answered by shruti g 1 · 0⤊ 0⤋
Actually, if they are the same size, chances are that they will be the same temperature as well. Check this out:
"Based on this evidence, we conclude
Stars spend most of their lives as main sequence stars.
During its lifetime, the surface temperature and luminosity stays pretty much constant.
Something else could happen in the star birth process.
Something else could happen in the star death process.
The star's mass determines what the temperature and luminosity is during the star's main sequence lifetime.
More mass -> hotter.
More mass -> more luminous.
Also, more mass -> bigger. " [See source.]
Only if their densities were different would there be diffent masses and, consequently, luminosities. Their densities could be different if they were in different stages of their lives (one dying the other being born, for example)
In any case, luinosity is proportional to T^4; where T is temperature. So hotter stars will be more luminous given everything else is equal.
2006-09-27 14:46:57 · answer #2 · answered by oldprof 7 · 0⤊ 0⤋
It totally depends upon their compositions. If both have identical ratios of gasses, then they will appear equally bright and be at equal temperatures. If they have different ratios then the one with more of the respectively heavier elements will burn hotter because it will have more pressure. I'm not sure as to which one will burn brighter, but my eduacted guess would be the lighter one because it would contain a higher ratio of hydrogen which when undergoing fussion puts out the most photons.
2006-09-27 13:51:26 · answer #3 · answered by ohmneo 3 · 0⤊ 0⤋
as i think the hotter one. Because the increase in temperature increases the rate of reaction. Thus due to too much heat the hotter one will produce too much light faster.
u know what types of reaction takeplace in sun and other stars
2006-09-27 13:51:11 · answer #4 · answered by behroz_ahmedali 2 · 0⤊ 0⤋
The hotter of the two will be brightest.
2006-09-27 13:51:54 · answer #5 · answered by Chug-a-Lug 7 · 0⤊ 0⤋