All wavelengths carry energy, and after being absorbed all turn into heat.
But temperatures that generally exist at the surface of the earth produces mostly the lower energy, infrared and microwave wavelengths. So those are essential in getting rid of heat by radiating it into space.
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Regards,
John Popelish
The Sun emits a range of wavelengths of energy, visible light, UV, radio waves, micro waves, Neutrinos, x-rays.
Both visible light and UV are converted to IR, for UV much of this happens high in the atmosphere at the ozone layer while for visible light much lower in the atmosphere at cloud and ground level. All IR wants to radiate back to space, if it's formed high in this atmosphere this happens more easily at ground level clouds and the atmosphere (i.e. greenhouse gases) slow the process of heat loss. Increase the volume of greenhouse gases and you slow the heat loss even further, the effect is small (so far) only adding up to ~1c on average although the effect is a little greater in the higher latitudes 3-5c on average.
http://www.universetoday.com/60065/radia...
A simple analogy would be a kitchen colander, if you put a flow of water into it and balance enough of a flow to half fill it where the water in is the energy coming from the Sun and the water flowing out the bottom is the heat lost back to space. if you then block up a number of the holes in that colander the water level in the colander with start to slowly rise. Of course in the real world these effect happen over decades to hundreds of years. But CO2 has certainly risen almost 40% and temperature has also risen ~1c (as a global average) denier say this is nothing, deniers keep trying to claim this is nothing yet these same deniers also keep telling us how bad the cold of an ice age is and that is a average change of just 8c.
The majority of what hits us on earth is UV which we do not register as heat. The UV energy absorbed by the earth is re-emitted as Infared energy which we do feel as heat. It is all potentially damaging energy, the uv burns your skin even though you don't feel it burning you, the infared registers as heat by your body. It is all because of an theory called blackbody radiation where energy absorbed by something is re-emitted as another energy wavelength based in the makeup of the object absorbing the energy.
heat is a kind of energy which is necessary .and there is global warming now days, so i think UV(ultra volient) rays carry most of heat so that why global warming is increasing day by day.
Temperature
All wavelengths.
There are people called laser pointer hobbyists. They own lasers pointers of different wavelengths and power levels. They have shined these lasers on their own skin. The shorter wavelengths (ultraviolet, violet, blue) actually feel hotter than the infrared lasers. That's probably because the infrared passes through your flesh and spreads out more (at least near infrared).
Temperature is defined as the kinetic energy of molecules/atoms. Heat is simply another word for 'energy that raises temperature'.
Both UV and IR are forms of 'heat', it just depends on the material doing the absorbing or the emitting.
The reason we associate heat with infra-red is simply because most objects on earth are somewhere between 0 and 100 degrees centigrade. At those temperatures, objects emit infra-red wavelengths. If they were hotter, they'd emit visible. And hotter still, they'd emit UV.
So, both UV and IR are forms of heat. We think of IR as heat only because the temperatures of objects on earth are relatively low.
Heat is a somewhat intangible concept, so I'd rather think in terms of energy. Both infrared and ultraviolet have energy and both can heat things up. Sunlight contains both type of light, although it's actually peaked in the visible spectrum.
That would be infrared – a type of heat radiation, the Sun emits ultraviolet in the form of UV light,
infrared rays.
