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Different between UVA and UVB

Different between UVA and UVB

Overexposure to the sun can result in a number of issues, including sunburn, skin cancer, and premature aging. While there are many different types of ultraviolet (UV) radiation emitted by the sun, two types in particular – UVA and UVB – have different effects on the skin. In this blog post, we will explore the differences between UVA and UVB radiation, and how to protect your skin from both.

What is UVA?

UVA is an abbreviation for “ultraviolet A.” UVA is a type of high-energy light on the electromagnetic spectrum. UVA rays are shorter than visible light waves but longer than X-rays. UVA rays make up about 95 percent of the UV radiation that reaches the Earth’s surface. People are mostly exposed to UVA rays when they are outdoors, although UVA rays can penetrate clouds and glass. UVA rays can also be emitted by some artificial lighting sources, such as tanning beds and black lights. UVA exposure is known to cause skin damage, including premature aging and wrinkling, as well as eye damage, such as cataracts. UVA rays can also suppress the immune system, which makes people more susceptible to skin cancer.

What is UVB?

UVB radiation is a type of electromagnetic radiation that is emitted by the sun. UVB rays are shorter than UV-A rays, and they have more energy. UVB radiation is responsible for causing sunburns, and it can also damage the DNA of cells. Exposure to UVB rays can lead to skin cancer, eye damage, and other health problems. UVB rays are filtered by the atmosphere, so they are not as harmful to humans as UV-A rays. However, UVB rays can still penetrate the skin and cause damage. People should take precautions to protect themselves from UVB radiation, such as wearing sunscreen and staying out of direct sunlight.

Difference between UVA and UVB

UVA and UVB rays are both types of ultraviolet radiation. UVA rays are longer in wavelength than UVB rays, and they can penetrate deeper into the skin. However, UVB rays are more intense and thus more harmful to the skin. Both UVA and UVB rays can cause sunburn, skin cancer, and other damage to the skin. It is important to protect yourself from both types of ultraviolet radiation by wearing sunscreen and avoiding direct sun exposure.


Ultraviolet radiation is classified into three types based on the wavelength of light that it emits – UVA, UVB, and UVC. The main difference between UVA and UVB is that UVA rays are long-wavelength rays while UVB rays are short-wavelength rays. This means that UVA penetrates deep into the skin, damaging collagen and elastin fibers, while UVB only affects the outer layer of the skin. Both forms of ultraviolet radiation can cause sunburns, premature aging, and skin cancer. It’s important to be aware of these dangers and take steps to protect yourself from both UVA and UVB exposure.

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