Phys214Formulas and Constants - Final

Phys214Formulas and Constants - Final - Some useful...

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Some useful constants and formulae Speed of light 8 2.9979 10 / cm s Gravitational constant 11 2 2 6.67 10 / GN m k g Permittivity constant 12 0 8.85 10 / Fm ε Permeability constant 6 0 1.26 10 / Hm μ Near point P N = 25 cm Planck’s constant h = 6.63 x 10 -34 J.s = 4.14 x 10 -15 eV.s e = 1.60 x 10 -19 C atomic mass m ( 1 1 H) =1.007825 u m e = 9.11 x 10 -31 kg = 0.000549 u 1 u = 1.6605 x 10 -27 kg = 931.5 MeV/c 2 m p = 1.6726 x 10 -27 kg = 1.00728 u 1eV = 1.602 x 10 -19 J m N = 1.6749 x 10 -27 kg = 1.008665 u 1240 hc eV nm = Transverse Waves: (,) s i n ( ) m yxt y kx t ω =− 2 k π λ = 2 2 f T == vf Tk == = Electromagnetic Waves: s i n ( ) m Ext E k x t s i n ( ) m Bxt B t = m m E c B = 2 m rms E E = 00 1 c εμ = 0 1 SE B = × r r r 2 11 B E c μμ 2 0 1 rms I E c = 2 4 source P I r = Unpolarized Light: 0 1 2 I I = Fully Polarized Light: 2 0 cos II θ = Law of reflection ' = Snell’s Law 2 2 sin sin nn = Total internal reflection 1 2 1 sin c n n = Brewster angle 1 2 1 tan B n n = Total Absorption c I p c = Total Reflection 2 r I p c = Mirrors and Lenses: Spherical Mirrors/Thin Lenses: 111 p if + = i m p = − Spherical Mirrors: 2 r f = Refracting Surface: 12 2 1 p ir += 2 1 n
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Phys214Formulas and Constants - Final - Some useful...

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