ULTRAVIOLET radiationHYPERPLASIAEFFECT of radiation on skinMYCOSIS fungoidesSummaryA female patient is presented w ho consistently developed lesions of disseminated superficial porokeratosis (DSP) whilst on holiday abroad. The lesions resolved completely within 4–6 weeks of return to the UK. Induction of...
UV Radiation Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum between X-rays and visible light or between 40 and 400 nanometer (nm) wavelengths. The primary source of UV radiation is the sun. There are also a number of artificial sources, such as tanning ...
Ultraviolet radiation is one section of the electromagnetic spectrum. The range of wavelengths for ultraviolet radiation are between 400 nm - 10 nm. Ultraviolet radiation is divided into subsections, which have different applications. Ultraviolet radiation at wavelengths below or around 10...
Scientists have known that there is adifference between the sun's visible radiationand invisible ultraviolet radiation from thesun. (See figure 1.) Ultraviolet radiationis separated into 3 types: UVA, UVB, and
这是2024年以来化妆品业界最大的一件事了:前两天突然有记者朋友跟我讲,网上爆出某品牌一款含油橄榄提取物成分的畅销产品被一位很帅的护肤博主送检,发现产品中并不含油橄榄提取物中应该含有的两种标志性成分:橄榄苦苷和羟基酪醇。 关键是,这个品曾经被一位更帅的千万级博主推荐过,...
Planckian radiation is essentially any light source that creates light by generating heat. This includes incandescent and halogen light sources. So when we measure the CRI of a 3000K LED lamp, it is being judged against a "natural" light source that has the same spectrum as a 3000K halogen...
● Alas, we now know that these chemicals have the potential to damage the ozone layer in the stratosphere. The ozone layer in the upper atmosphere, high above our weather systems, absorbs ultraviolet (UV) radiation from the sun and prevents it from reaching the surface of the planet, w...
这是2024年以来化妆品业界最大的一件事了:前两天突然有记者朋友跟我讲,网上爆出某品牌一款含油橄榄提取物成分的畅销产品被一位很帅的护肤博主送检,发现产品中并不含油橄榄提取物中应该含有的两种标志性成分:橄榄苦苷和羟基酪醇。 关键是,这个品曾经被一位更帅的千万级博主推荐过,所以事件的关注度一下子就很高了...
What is ultraviolet catastrophe and how does Planck's law explain ultraviolet catastrophe? ; this divergence for high frequencies is called the ultraviolet catastrophe. Max Planck explainedthe blackbody radiation in 1900by assuming that the energies of the oscillations of electrons which gave rise to ...
Over time, the rising temperatures would have leveled off, solar ultraviolet radiation having broken down atmospheric water vapor molecules into hydrogen and oxygen. With all the water vapor gone, the greenhouse effect would no longer have accelerated....