What is ultraviolet light?
light consists of waves of energy that can move without the presence of the medium to browse. Light energy has both electrical and magnetic fields, so it is often referred to as electromagnetic radiation . Light waves come in many sizes or wavelengths. The light we see is only a very small part of the spectrum of light waves that exist. Ultraviolet light is part of the electromagnetic spectrum behind the visible light. UV light has a shorter wavelength, higher frequency and higher energy than light in a visible spectrum. The wavelength is the size of the wool or the distance between the two corresponding points on the waves - for example, the top to the top or trough on the riverbed. The frequency is the number of waves that pass by a certain point over a specific time interval, usually one second. The frequency is directly related to energy, so the higher the frequency of the wool, the higher the energy and vice versa.
Depending on the frequency of light, different colors are formed. In a visible spectrumRVY moves from red, at the lowest frequency of visible light to purple. Ultraviolet light is named so that it is purple. It has a shorter wavelength than purple light and higher frequency and energy. X -rays come after UV light on the electromagnetic spectrum.
UV light spectrum can be divided in many different ways. Scientists refer to close, extreme and distant UV light, based on wavelengths of light and how energy is. UVA, UVB and UVC are also used to categorize ultraviolet light. The categories are again determined by the length of the wavelength and energy. UVA or near UV light has the longest wavelength and the smallest energy, while Extreme has the shortest and most energy.
Most ultraviolet light on the ground comes from the sun. When the light will reach the atmosphere, react with oxygen molecules and create ozone. This reaction is what causes ozonovA layer is above the ground. The ozone layer can be anywhere from six to 31 miles (10 to 50 km) above the sea level. Almost all ultraviolet light with short wool is absorbed by the ozone layer before it reaches the Earth's surface.
Ultraviolet light with longer wavelength or UVA is able to pass through the ozone layer and continue to the surface. This type of UV radiation causes sunbathing and burning. These wavelengths are essential for a healthy human life because they cause vitamin D production in the body. This is used to create healthy bones and teeth. UV light can also be used to treat skin conditions such as psoriasis.
Too much exposure to ultraviolet light will have harmful effects. UVB light causes burning and some types of skin cancer. The most dangerous of skin cancer is caused by damage to DNA skin cells UVB light. All types of UV light also affect collagen, resulting in premature skin aging.