Light of cellular water are raised in temperature by the infrared radiation. EMR in this range causes molecular vibration and heating effects, which is how these animals detect it. Above the range of visible light, ultraviolet light becomes invisible to humans, mostly because it is absorbed by the cornea below 360 nm and the internal lens below 400 nm. Furthermore, the rods and cones located in the retina of the human eye cannot detect the very short (below 360 nm) ultraviolet wavelengths and are in fact damaged by ultraviolet. Many animals with eyes that do not require lenses (such as insects
Absorbed dose permits the use of the units curie, rad, and rem alongside SI units, the European Union European units of measurement directives required that their use for "public health ... purposes" be phased out by 31 December 1985. Absorbed dose Absorbed dose is a measure of the energy deposited in a medium by ionizing radiation. The unit of measure derived from the SI system is the gray (Gy), which is defined as one Joule of energy absorbed per kilogram of matter. Absorbed dose is used in the calculation of dose uptake in living tissue in both radiation protection (reduction of harmful