Hydrogen gas discharge tubeEach element has a unique atomic spectrum which consists of discrete lines and is therefore not continuous. The simplest element, hydrogen has lines in the visible region at wavelengths of 656 nm, 486 nm, 434 nm 410 nm etc. which converge at the higher energy end of the spectrum at 365 nm.These lines are governed by a simple mathematical relationship: = R ( − ) where n = 3 (to give 656 nm),...