What is the wavelength of incoming solar radiation?
The normal measurement of the wavelength of solar and atmospheric radiation is the nanometer (nm, 10-9 m) and for infrared radiation is the micrometer (µm, 10-6 m). The range is shown in below table. In astronomy and older books you may see wavelengths in Ångström (Å, 10-10 m).
What scatters incoming solar radiation?
Scattering of solar radiation occurs when the radiation strikes very small objects in Earth’s atmosphere, such as air molecules, tiny water droplets, ice crystals, or aerosols (tiny airborne particles), which disperse the solar radiation in all directions.
How do the wavelengths of most of the radiation emitted by the sun differ from those emitted by the surface of the Earth?
The Sun emits radiation at a shorter wavelength than the Earth because it has a higher temperature, and Planck’s curve for higher temperatures peaks at shorter wavelengths. It is for this reason that Earth’s radiation is referred to as longwave, and the Sun’s radiation is called shortwave.
Which wavelength of incoming solar radiation has the highest energy?
Of the solar energy that reaches the outer atmosphere, UV wavelengths have the greatest energy. Only about 7 percent of solar radiation is in the UV wavelengths.
What wavelength is sunlight?
Ordinarily, sunlight is broken down into three major components: (1) visible light, with wavelengths between 0.4 and 0.8 micrometre, (2) ultraviolet light, with wavelengths shorter than 0.4 micrometre, and (3) infrared radiation, with wavelengths longer than 0.8 micrometre.
What three things may happen to incoming solar radiation?
Once energy from the Sun gets to Earth, several things can happen to it:
- Energy can be scattered or absorbed by aerosols in the atmosphere.
- Short wavelengths are absorbed by ozone in the stratosphere.
- Clouds may act to either reflect energy out to space or absorb energy, trapping it in the atmosphere.
Is nitrogen a good or poor absorber of incoming solar radiation?
Absorption • Nitrogen, the most abundant constituent in the atmosphere, is a poor absorber of all types of incoming radiation. Oxygen and ozone are efficient absorbers of ultraviolet radiation.
What is the relationship between net radiation and location on Earth?
In other words, net radiation is the energy available to Earth at the Earth’s surface. Some places absorb more energy than reflect, while other places on Earth reflect more energy than absorb.
In which collector the efficiency is maximum?
Explanation: Evacuated flat plate collectors provide the highest energy conversion efficiency in non-concentrating solar collectors. Parabolic collector is not a non-concentrating collector.
What happens to the radiation from the Sun?
What Happens to Incoming Solar Radiation? The solar radiation Earth receives primarily consists of shorter wavelengths of visible light. As Wein’s law explains, the sun’s high temperature emits solar radiation of mostly shorter wavelengths. This incoming solar radiation may be scattered, reflected, or absorbed.
How does the wavelength of light affect a solar cell?
Some of the energy becomes heat, and some reflects off the cell’s surface. If you carefully plot a solar cell’s output energy against the wavelength of incoming light, your graph will show a response curve that begins at about 300 nanometers.
Why does the Sun have a shorter wavelength than the Earth?
This follows directly from the electromagnetic energy spectrum and the respective temperatures of the Sun and Earth. The Sun emits radiation at a shorter wavelength than the Earth because it has a higher temperature, and Planck’s curve for higher temperatures peaks at shorter wavelengths.
Why is the Sun called short wave radiation?
It is also called short-wave radiation because the sun is hotter than the earth and emits shorter wavelengths of radiation. These fall mainly in the ultraviolet and visible portions of the electromagnetic spectrum. Radiation is the transfer of energy by electromagnetic waves (have electrical and magnetic properties).