SAT2物理考试常用公式(2).

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

Snell&aposs Law: n₁·sin(θ₁) = n₂·sin(θ₂) Wave speed: v = λ·f Velocity of light: v = c/n Magnification: m = -d_i/d_o Law of Rlection: θ_rlection = θ_incidence 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: T_half = ln(2)/λ Mass energy equivalence: E = m_o·c²

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

Electric Fields and Forces Formulas

Coulomb&aposs 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&aposs 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: R_s = R₁ + R₂ +... Equivalent resistance of parallel resistors: 1/R_p = 1/R₁ + 1/R₂ +... Equivalent capacitance of series capacitors: 1/C_s = 1/C₁ + 1/C₂ +... Equivalent capacitance of parallel capacitors: C_p = 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 = (μ_o/2π)·(I/r) Faraday&aposs Law: E = -dΦ/dt