Sound — Formula Sheet
Maharashtra Board · Class 11 · Physics
6 formulas from Sound (Maharashtra Board Class 11 Physics) on one page, grouped by topic. Part of the Maharashtra Board Class 11 Physics syllabus.
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Formulas and Key Relations
Mathematical Expression of Waves
Sinusoidal wave equation
y(x,t) = a sin(kx - ωt + φ)
Wave traveling in +x direction
y = a sin(kx - ωt + φ)
Speed of Sound - Newton's and Laplace's Formulas
Newton's formula
v = √(P/ρ) assuming isothermal process
Laplace's correction
v = √(γP/ρ) considering adiabatic process
γ = Cp/Cv = 1.41 for air (adiabatic ratio)
Key relations
Newton proposed v = √(P/ρ) for isothermal process, giving v = 280 m/s at NTP.
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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