See more pictures of marine mammals. Sebastien Burel/Dreamstime.com. By considerable measure, the largest known animal on Earth is the blue whale. Mature blue whales can measure anywhere from 75 feet (23 m) to 100 feet (30.5 m) from head to tail, and can weigh as much as 150 tons (136 metric tons).
X-rays are produced when electrons strike a metal target. The electrons are liberated from the heated filament and accelerated by a high voltage towards the metal target.The X-rays are produced when the electrons collide with the atoms and nuclei of the metal target.-rays are produced when electrons strike a metal target. The electrons are liberated from the heated filament and accelerated by a high voltage towards the metal target.
1 Excitation and ionisation. 2  X-Rays produce excitation and ionisation of the atoms and molecule of the substances through which they pass. 3  Excitation is the process of raising an electron to a higher energy level. 4  Ionisation is the process in which an electron is completely removed from an atom.5  Biological effect. Excitation and ionisation. 2  X-Rays produce excitation and ionisation of the atoms and molecule of the substances through which they pass. 3  Excitation is the process of raising an electron to a higher energy level. 4  Ionisation is the process in which an electron is completely removed from an atom. 5  Biological effect.