how sun light is hot while it reaches earth?

Answer 1

Most of the heat in sunlight is in the form of infra-red radiation. This heats up anything that absorbs.

Answer 2

Actually the solar radiation which is received on the earth is a short wave radiation and it does not heat the atmosphere directly.The radiation heats the earth's surface first.Thus this short wave radiation is transformed into heat at the earth's surface only.Part of this heat energy is radiated out to space as long wave radiation which is easily obsorbed by atmosphere, part is carried upward as sensible heat by convection and turbulent eddies and part obsorbed by evaporation process from water surfaces.The remaining heat penetrates downwards and raises the temperature of the surface.Apart from this, water vapour is powerful absorber of heat radiation that is emitted by the earth's surface.It is because of this property of water vapour that the atmosphere near the earth's surface does not cool rapidly leading to the "greenhouse effect" whenever there is a cloud cover.Now you can understand why the sun light is hot near the surface.

Answer 3

So far you have two answers from two complete boobs...

If you want to know what the spectrum of electromagnetic energy leaving the sun looks like (total energy vs wavelength) do your own google search and you will see that the majority of the energy reaching the earth from the sun is NOT infrared. Common sense is not a good reference source... That is what got Republicans into power in the US... Thank God, that night mare is almost over!

If Spanish is your native language you mean "How hot is sun light when it reaches the earth?" If your native language is Chinese, or Asian, you might mean, "How is sunlight hot while it travels to earth?" These are very different questions.

I wonder if your first two answerers noticed that you are not a native english speaker.

Answer 4

See the link and take your understanding to the MAX!
http://www.srh.noaa.gov/srh/jetstream/atmos/heat.htm

The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface. Since this energy warms the earth's surface and atmosphere, some of it is or becomes heat energy. There are three ways heat is transferred, into the atmosphere:
radiation
conduction
convection

Radiation
If you have stood in front of a fireplace or near a campfire, you have felt the heat transfer known as radiation. The side of you nearest the fire warms, while your other side remains unaffected by the heat. Although you are surrounded by air, the air has nothing to do with this transfer of heat. Heat lamps, that keep food warm, work in the same way. Radiation is the transfer of heat energy by electromagnetic radiation.

Most of the electromagnetic radiation that comes to the earth from the sun is in the form of visible light. Light is made of waves of different frequencies. The frequency is the number of instances that a repeated event occurs, over a set time. In electromagnetic radiation, the frequency is the number of times an electromagnetic wave moves past a point each second.

Our brains intrepret these different frequencies into colors, including red, orange, yellow, green, blue, indigo, and violet. When the eye views all these different colors at the same time, it is interpreted as white. Waves from the sun which we cannot see are infrared, which have lower frequencies than red, and ultraviolet, which have higher frequencies than violet light. [more on electromagnatic radiation]

Most of the solar radiation is absorbed by the atmosphere and much of what reaches the earth's surface is radiated back into the atmosphere to become heat energy. Dark colored objects such as asphalt absorb more of the radiant energy and warm faster that light colored objects. Dark objects also radiate their energy faster than lighter colored objects.

Conduction
Conduction is the transfer of heat energy from one substance to another or within a substance. Have you ever left a metal spoon in a pot of soup being heated on a stove? After a short time the handle of the spoon will become hot. This is due to transfer of heat energy from molecule to molecule or from atom to atom. Also, when objects are welded together, the metal becomes hot (the orange-red glow) by the transfer of heat from an arc. This is called conduction and is a very effective method of heat transfer in metals. However, air conducts heat poorly.

Convection
Convection is the transfer of heat energy in a fluid. This type of heating is most commonly seen in the kitchen when you see liquid boiling.

Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere. As it rises, the bubble cools with the heat contained in the bubble moving into the atmosphere.

As the hot air mass rises, the air is replaced by the surrounding cooler, more dense air, what we feel as wind. These movements of air masses can be small in a certain region, such as local cumulus clouds, or large cycles in the troposphere, covering large sections of the earth. Convection currents are responsible for many weather patterns in the troposphere.

Answer 5

The Sun has no sharply defined surface like that of the Earth, because it is too hot to be anything but gas. Rather, what appears to us as the surface is a layer in the Sun's atmosphere, the "photosphere" (sphere of light) which emits light ("radiates") because ot its high temperature.

Answer 6

Perhaps the question should be how much energy a ray of light has lost before it reached the earth.

If you can find an answer to this and recover the lost energy you wouldn't need the oil or any other external energy source.

Answer 7

Simple answer

Light is just one small band of the radiation spectrum. The sun sends radiation in many forms, light is just one of them. Heat is another. They are separate bands of electro-magnetic energy.

Even your average light bulb emits 90% of its energy as heat, and only 10% as light.

Answer 8

Heat travels in 3 ways: convection, conduction and radiation. Research these three ways and you will understand. The heat you feel on your skin in the sunlight is from Radiation. That is why it is cooler under a shade tree.

Answer 9

the heat in sun rays is due to infra red rays. these rays have wavelength greater than 700 nm. They can easily be trapped by glass, n green house gases

Answer 10

Sunlight by itself isn't hot, light isn't hot, energy from this light in the form of infrared radiation is what makes any object hot when exposed to the sunlight.