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The "chemical rays" found by him were afterwards called ultraviolet radiation. [ 7 ] [ 8 ] [ 9 ] Some of Ritter's researches were acknowledged as important scientific contributions, but he also claimed the discovery of many phenomena that were not confirmed by other researchers.
As ozone does exist in the atmosphere, the Dobson Spectrometer can use the ratio between UVA and UVB radiation on the ground to determine how much ozone is present in the upper atmosphere to absorb the UVC radiation. The ratio is determined by turning the R-dial, which can be rotated a full 300°, on the instrument.
Ozone is transparent to most UV-A, so most of this longer-wavelength UV radiation reaches the surface, and it constitutes most of the UV reaching the Earth. This type of UV radiation is significantly less harmful to DNA, although it may still potentially cause physical damage, premature aging of the skin, indirect genetic damage, and skin cancer.
The terms chemical and heat rays were eventually dropped in favor of ultraviolet and infrared radiation, respectively. [1] 1895 Discovery of the ultraviolet radiation below 200 nm, named vacuum ultraviolet (later identified as photons) because it is strongly absorbed by air, by the German physicist Victor Schumann [2] 1895
ALICE measured ultraviolet light resulting from the impact of the Centaur upper rocket stage on the floor of the crater Cabeus. This confirmed that water ice is present on the moon. [13] [14] The Rocky 7 Rover prototype used an Ocean Optics point spectrometer which was sensitive in the range of 350-800 nm. [8]
Doritos are a revered snack for many. Now, scientists have found one of the ingredients in the triangle-shaped tasty tortilla chips has a superpower – it can make the skin of mice transparent.
The ozone layer has little effect on the longer UV wavelengths called UV-A (315–400 nm), but this radiation does not cause sunburn or direct DNA damage. While UV-A probably does cause long-term skin damage in certain humans, it is not as dangerous to plants and to the health of surface-dwelling organisms on Earth in general (see ultraviolet ...
The dull halogen light. The spinning glass plate. The humming that terminates in a “BEEP.” Today the sights, sounds, and smells of the microwave oven are immediately familiar to most Americans.