Friday, February 5, 2010

The glow of the sun is caused by a nuclear reaction. True or False?

need it soonThe glow of the sun is caused by a nuclear reaction. True or False?
True.The glow of the sun is caused by a nuclear reaction. True or False?
True and false. It depends how you read the question.





The ';glow'; of the Sun is caused by the fact that the Sun's surface has a temperature of 5780 K (= 6050 C = 10,900 F).





Any object heated to that temperature would emit the same kind of light (the ';glow';) as the surface of the Sun does. Same flux (Watts per square metres), same color distribution (spectrum).





The heat needed to keep the Sun's surface at that temperature comes from the Sun's lower layers in the form of convection currents (hot gas move up, dumps its excess heat onto the surface; cooled gas moves back down to take the place of the ascending hot gas).





At some layer, deep into the Sun's interior, the cool gas is heated by absorbing photons that are emitted by extremely hot atoms and particles.





They are being kept that hot by gamma rays emitted by the nuclear fusion going on at the centre of the sun (hydrogen atoms being fused into helium atoms).





So, the glow is caused by the temperature, the temperature is caused by the central heat. The heat is caused by the nuclear reaction.





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It is like asking: is the glow of streetlights caused by the city's coal-fired electrical plant?





Coal fire causes heat, heat boils water into steam, steam drives turbine, turbine turns generator, generator generates electricity, electricity causes the light to glow.
True. (I wouldn't call it glow though) Hidrogen atoms fuse together and in the process release photons... and other stuff, but the ';glow'; is photons ^_^
True.


The radiates both heat and light by nuclear fusion, converting hydrgen into helium by nuclear reaction.
yeah like a bomb
TruE
True. The Sun's energy comes from fusing hydrogen in to helium. It is, in effect, a natural hydrogen bomb.
yes it is true that glow of the sun is caused by a nuclear reaction.fusion reaction occurs on the sun between the helium atom,neutrino,positron,deutron,etc which give rise in temp. upto 10000000000K and sun glows.

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