Introduction to Spectroscopy (Chapter 6) Electromagnetic radiation(wave)description: Wavelength入 Velocity v Amplitude A Time t or Distance x Period p time for 1 A to pass fixed point 1 Frequency v of passing per sv= p 1 Wavenumber v #of入per cm Velocity v Distance point on wave travels per second V=V入 In a vacuum:Vvacuum=c =2.99782x108m/s A set of waves with identical (a)fregency (b)phase are called coherent. CEM 333 page 2.1 Introduction to Spectroscopy (Chapter 6) Electromagnetic radiation (wave) description: Electric Field Strength Time t or Distance x Amplitude A Velocity v Wavelength l 0 Period p time for 1 l to pass fixed point Frequency n # of l passing per s n = 1 p æ è ç ö ø ÷ Wavenumber n # of l per cm n = 1 l æ è ö ø Velocity v Distance point on wave travels per second In a vacuum: v = n ×l vvacuum = c = 2.99782x108 m / s A set of waves with identical (a) freqency (b) phase are called coherent . CEM 333 page 2.1