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What are the 3 kinds of ultraviolet radiation and define each?
Based on the interaction of wavelengths of ultraviolet radiation with biological materials, three divisions have been designated: UVA (400–315 nm), also called black light; UVB (315–280 nm), responsible for the radiation’s best-known effects on organisms; and UVC (280–100 nm), which does not reach Earth’s surface.
What is the difference between UV A UV B and UVC radiation?
UVC is the shortest and not long enough to reach our skin; UVB rays come in contact with the outer layer of the skin; UVA radiation penetrates deeper into the skin, all the way into the inner layers. UVC rays are actually the strongest but are mostly absorbed by the atmospheric ozone.
What is UVA and UVB rays?
On the electromagnetic spectrum, UV light has shorter wavelengths than visible light, so your eyes can’t see UV, but your skin can feel it. Ultraviolet A (UVA) has a longer wavelength, and is associated with skin aging. Ultraviolet B (UVB) has a shorter wavelength and is associated with skin burning.
What does the C stand for in UVC?
ultraviolet. ultraviolet C (UVC) ultraviolet radiation with wavelengths between 200 and 290 nm; all of this type of radiation is filtered out by the ozone layer so that none reaches the earth’s surface. Ultraviolet C is germicidal and is also used in ultraviolet phototherapy.
What does UVB stand for?
UVB Phototherapy is a treatment for skin eruptions using artificial ultraviolet light. The initials UVB stand for the type B ultraviolet, the middle energy between the tanning rays (UVA) and the intense germicidal UVC. UVB rays are the part of sunlight that gives one sunburn.
What are the 3 main types of radiation?
Radiation is energy, in the form of particles or electromagnetic rays, released from radioactive atoms. The three most common types of radiation are alpha particles, beta particles, and gamma rays. Alpha radiation is not able to penetrate skin.
What are the three types of UV rays?
The sun emits three different types of UV radiation: UVA, UVB and UVC. While UVC rays are filtered by the ozone, 10\% of UVB and 95\% of UVA rays reach the earth’s surface.
What are the different types of UV radiation?
Advertisement The sun emits all kinds of rays: cosmetic rays, gamma rays, x-rays, ultraviolet rays, infrared rays, microwaves, short radio waves and long radio waves. There are two types of ultraviolet solar radiation — A and B. Both types of rays may cause skin damage or possibly skin cancer.
How does ultraviolet radiation harm living things?
UV radiation has been shown to be harmful to living organisms, damaging DNA, proteins, lipids and membranes. Plants, which use sunlight for photosynthesis and are unable to avoid exposure to enhanced levels of UV radiation, are at risk. Thus, mechanisms by which plants may protect themselves from UV radiation are of particular interest.
Is UVA harmful?
UVA overexposure may cause toughening of the skin, wrinkling, loss of elasticity, sun spots, cataract formation, and even suppression of the immune system. Overexposure to UVB rays has been known to cause harmful effects such as sunburns, cataracts and the development of skin cancer.