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SAT2物理考试的常用公式整理(2)

2014-01-02 17:42

来源:新东方网整理

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  SAT II物理光波学常见公式Physics Formulas - Waves and Optics

  Snell's Law: n1·sin(θ1) = n2·sin(θ2)

  Wave speed: v = λ·f

  Velocity of light: v = c/n

  Magnification: m = -di/do

  Law of Reflection: θreflection = θincidence

  Mirror and lens equation: 1/d1 + 1/d1 = 1/f

  SAT II物理现代物理常见公式Physics Formulas - Modern Physics

  The energy of a photon: E = h·f

  Matter wavelength: λ = h/p

  Relativistic factor: γ2 = 1/(1 - v2/c2)

  De Broglie Wavelength: λ = h/(mv)

  Half life of radioactive material: Thalf = ln(2)/λ

  Mass energy equivalence: E = mo·c2

  SAT II物理电磁学常见公式Physics Formulas - Electricity and Magnetism

  Electric Fields and Forces Formulas

  Coulomb's Law: F = k·q1·q1/r2

  Electric field of a charge q: E = k·q/r2

  Work done by electric field: W = q·E·d

  Electric field between two metallic plates: E = V/d

  DC Circuits Formulas

  Ohm's Law: V = I·R

  Power dissipated in a resistor: P = I·V = V2/R = R·I2

  Resistance: R = ρ·l/A

  Equivalent resistance of series resistors: Rs = R1 + R2 +...

  Equivalent resistance of parallel resistors: 1/Rp = 1/R1 + 1/R2 +...

  Equivalent capacitance of series capacitors: 1/Cs = 1/C1 + 1/C2 +...

  Equivalent capacitance of parallel capacitors: Cp = C1 + C2 +...

  Magnetic Fields and Forces Formulas

  Magnetic force on a moving charge: F = q(v x B) = q·v·B·sin(θ)

  Magnetic force on a current carrying wire: F = I·l·B·sin(θ)

  Magnetic field created by a current: B = (μo/2π)·(I/r)

  Faraday's Law: E = -dΦ/dt

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