the suns energy

by: kayla :)

suns energy

The energy coming from the sun to the Earth's surface is called solar energy. Sun energy is generated in its nucleus mainly through the thermonuclear reaction of hydrogen fusion into helium. In the form of electromagnetic waves this energy is then transmitted from the nucleus towards the surface of the Sun and further on in the surrounding space. The Sun's energy is generated in its core. Gravitational pressures compress and heat the material in the core to over 15 million degrees Celsius or about 27 million degrees Fahrenheit.

not all of the sun's energy comes to earth. the suns energy is emitted in all directions, with only a small fraction being in the direction of the Earth. The average energy of the sun of the whole earths is 2 calories (cal)/ square centimeter (cm2) / minute (min). It is also called the solar constant.

34% of the sun's energy is reflected back into space by snow and clouds. This reflective quality of a planet is called its albedo.
Only the half -billionth part of the Sun energy reaches the Earth. Only about 5 percent of all available sun energy is conserved as chemical energy in the biomass of plants. A theoretically optimal 80 percent of this energy can be used by the organisms of the next higher trophic level.

Sun energy is clean, inexhaustible and can be transformed into other forms of energy: thermal, electric, chemical, mechanical, etc. The solar energy that energizes the plants goes on to become the fuel that allows animals to live and grow.

The most common forms of renewable energy are solar, wind, water or hydro, biomass and geothermal energy. Renewable energy sources are maintained or replaced by nature after use.

Sunlight can be converted to electricity using photovoltaic (solar electric) panels. This electricity can be used to operate a multitude of electrical appliances. Biomass energy is the sun's energy stored in organic materials such as wood, grains and peat. Wood and peat are both burned to provide heat. Grains can be fermented into ethanol and used as a liquid fuel.

Most of the sun's energy is emitted in a spectrum from 0.15 µm to 4 µm. 41% of it is visible, 9% is uv, 50 % infra-red. The trick to using it as an energy source is being able to convert it from visible light into heat, electricity or other usable form.

The Sun's energy is highly organized and carried by photons. Our Biosphere absorbs this energy and then releases it back to the Universe.

Most of the energy on the earth’s surface comes from the sun. In nature, the sun’s energy affects both living and non-living things. Coal is one way in which the sun's energy is stored temporarily, albeit for millions of years.
The Sun's Energy
The Energy of the Sun