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
kB =
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: En = -13.6 eV/n2