Wavelength is the distance between two consecutive crests or troughs in a wave. Waves are disturbances that travel through a medium without transporting matter. Sir William Herschel discovered waves in 1800s through temperature measurements
Electrons transition from n=2 to n=1 in hydrogen atoms to produce ultraviolet emission lines. Series named after Theodore Lyman, discovered between 1906-1914. Greek letters (alpha, beta, gamma) indicate transitions from n=2 to n=1
Wavelength is the horizontal distance between wave crests or troughs. Waves transmit energy without matter uptake through mediums. Visible light wavelength ranges from 400 to 700 nanometres