What is the wavelength of UV radiation?
The UV region covers the wavelength range 100-400 nm and is divided into three bands: UVA (315-400 nm) UVB (280-315 nm) UVC (100-280 nm).
What is the most probable wavelength in the solar spectrum?
Solar spectrum consists mainly, 44.7% of visible radiation (380 ∼ 780 nm), 6.6% of ultraviolet radiation (<380 nm) and 48.7% of infrared radiation (>780 nm).
What is the wavelength spectrum of the sun?
The sunlight that we see — aptly named visible light — falls into only a very narrow range of the spectrum, from about 400 to 750 nanometers (a nanometer is one-billionth of a meter, or about 400 millionths of an inch). The Sun also emits at longer wavelengths, in the infrared, microwave, and radio.
Why is UV light blue?
The uv light often originates from excited Mercury atoms which are in the bulb. Excited Mercury atoms also produces violet and blue visible light.
Which Colour is sunlight?
The sun’s rays are actually white in colour and form a mixture of the seven colours we see in a rainbow, i.e., Violet, Indigo, Blue, Green, Yellow, Orange, and Red, commonly called VIBGYOR.
How do I measure solar radiation?
The solar radiance is strongly dependant on location and local weather. Solar radiance measurements consist of global and/or direct radiation measurements taken periodically throughout the day. The measurements are taken using either a pyranometer (measuring global radiation) and/or a pyrheliometer (measuring direct radiation).
What is used to measure a solar radiation?
There are two important types of instruments to measure solar radiation: Pyrheliometer is used to measure direct beam radiation at normal incidence. There are different types of pyrheliometers. Pyranometer is used to measure total hemispherical radiation – beam plus diffuse – on a horizontal surface. If shaded, a pyranometer measures diffuse radiation. Photoelectric sunshine recorder.
How is the solar radiation a shortwave radiation?
Solar energy enters our atmosphere as shortwave radiation in the form of ultraviolet (UV) rays (the ones that give us sunburn) and visible light. The sun emits shortwave radiation because it is extremely hot and has a lot of energy to give off. Once in the Earth’s atmosphere, clouds and the surface absorb the solar energy.
How is the solar radiation measured?
How Is Solar Radiation Measured? Measurement of Direct Solar Radiation. Direct solar radiation is measured by means of pyrheliometers. Global and Diffuse Radiation Measurement. Global radiation is defined as the solar radiation received from a solid angle of 2π steradians on a horizontal surface. Infrared Radiation Measurement. Infrared radiation is measured by pyrgeometers.