1) the spectrum of lithium has a red line of 670.8 nanometers. (remember 1 m = 1 x 109 nm) a. convert the nanometer to meter using dimensional analysis. b. calculate the frequency of the wave. c. calculate the energy of a photon with this wavelength.

E = ħc / λ
 ħ = plancks constant = 6.626x10^-34 Js
c = speed of light = 2.999x10^8 m/s
λ = wavelength of light = 670.8x10^-9 m
 
E = (6.626x10^-34 Js) x (2.999x10^8 m/s) x (1 / 670.8x10^-9 m)
E = 2.962x10^-19 J

3x10^8 / (670.8 * 10^-9) =4.47x10^14 Hz
 
4.47x10^14 Hz multiplied by plank's constant = 2.9634x10^-19

Thank you for posting your question here at . I hope the answer will help you. Feel free to ask more questions here.