Ultraviolet radiation is part of the electromagnetic spectrum emitted by the sun. UVC rays, with wavelengths of 100 to 280 nanometers, are absorbed by the atmosphere's ozone layer, but most radiation in the UVA range (315 to 400 nanometers) and about 10 percent of the UVB rays (280 to 315 nanometers) are able to make it to Earth’s surface.

What is aberrationin optics

UVA and UVB rays are both of major importance to human health. According to the WHO, small amounts of UV radiation are necessary for the production of vitamin D in your body, but overexposure may result in serious health effects on the skin, eyes and immune system.

What is aberrationchromaticaberration

The UV Index is ranked on a scale from 0 to 11-plus, with 0 being the lowest and 11-plus being the most extreme. Those numbers are grouped as follows:

Most people have a general familiarity with the UV Index, but just how dangerous are those ultraviolet rays to your skin when the index is high?

Aberrationmeaning in Hindi

The UV Index is highest in the summer, when the Northern Hemisphere is tilted toward the sun and receives the greatest amount of direct sunlight and UV radiation.

The Weather Channel is the world's most accurate forecaster according to ForecastWatch, Global and Regional Weather Forecast Accuracy Overview, 2017-2022, commissioned by The Weather Company.

When the UV Index is 9, for example, you can get a sunburn in 20 minutes or less. Even when the UV Index is only 4, sunburn is still possible within 50 minutes. Sunburn can still occur when the UV Index is low – on a cloudy day, for example – but it typically takes an hour or longer.

What is aberrationin physics

We recognise our responsibility to use data and technology for good. We may use or share your data with our data vendors. Take control of your data.

Overexposure to UV radiation leads to sunburn in the short-term, which is painful and, if severe enough, can be considered a first-degree burn. In the long-term, there is an increased risk of developing skin cancer, which could potentially be fatal.

All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.

Used in the United States, the UV Index scale integrates the international guidelines for reporting established by the World Health Organization.