Keyword Analysis & Research: uv

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Frequently Asked Questions

What is UVC radiation?

A: UVC radiation is the highest energy portion of the UV radiation spectrum. UVC radiation from the sun does not reach the earth’s surface because it is blocked by the ozone layer in the atmosphere. Thus, the only way that humans can be exposed to UVC radiation is from an artificial source like a lamp or laser.

What is the UV index and why is it important?

The UV Index provides important sun safety information to help people plan outdoor activities. Regardless of your exposure to UV rays, conduct a monthly self-check to look for any skin abnormalities. Have a friend or family member check your back and scalp. Look for bumps or sores that don't heal or for moles that have changed size, color or shape.

What is a UV detector?

Virtually all fires emit some radiation in the UVC band, whereas the Sun 's radiation at this band is absorbed by the Earth's atmosphere. The result is that the UV detector is "solar blind", meaning it will not cause an alarm in response to radiation from the Sun, so it can easily be used both indoors and outdoors.

What is the difference between UVC and UVB?

All of the UVC and most of the UVB radiation is absorbed by the earth’s ozone layer, so nearly all of the ultraviolet radiation received on Earth is UVA. Even though UVA radiation is weaker than UVB, it penetrates deeper into the skin and is more constant throughout the year.

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