UV radiation differs on the basis of wavelengths. UVA has a medium to longer wavelength and can therefore reach deeper into the skin. UVB has a shorter wavelength, which is why it is used to treat ...
The strength of the sun's ultraviolet (UV) radiation is expressed as a Solar UV Index or Sun Index.The UV Index does not exceed 8 in the UK (8 is rare; 7 may occur on exceptional days, mostly in the ...
If the radar is close to the coast and the beam is broad enough, it may reflect off the sea and return strong reflectivity that is really just sea "clutter". At some wavelengths the radar beam is not ...