PHYSICS 100

Lasers module

Equations/constant

 

c = 3 x 10⁸ m/s

h = 6.6 x 10^-34 J-s

1 eV = 1.6 x 10^-19 J

k_B = 1.38 x 10^-23 J/K

E = hf  for light or other EM radiation

T = 1/f

Intensity = Energy/time/area = Power/area

q ~ l/D (actually  q = 1.22 l/D for a circular aperture of diameter D)

Energy levels in hydrogen atom:  E_n = -13.6 eV/n²