5 calculators in this category
- Wave Speed, Wavelength & Frequency Calculatorv = fλ; c = 299,792,458 m/s (SI exact)Every wave obeys one relation: speed equals frequency times wavelength. Choose which of the three you want, pick a medium —…
- Doppler Effect CalculatorClassical Doppler formula for a medium; relativistic longitudinal Doppler for lightEnter the emitted frequency and how fast the source and listener are moving, and this calculator returns the frequency actually…
- Sound Intensity & Decibel Level CalculatorISO 1683 reference quantities (I₀ = 1 pW/m², p₀ = 20 µPa)Give this calculator any one of sound intensity, sound pressure, source power or decibel level, and it returns the other three…
- Snell's Law Refraction CalculatorSnell's law of refraction (Snell–Descartes)Enter the refractive indices either side of an interface and the angle a ray strikes it, and this calculator returns the…
- Thin Lens Equation & Magnification CalculatorThin lens equation, Gaussian (real-is-positive) sign conventionGive this calculator a focal length, an object distance and an object height, and it locates the image from 1/f = 1/d₀ + 1/dᵢ…
Which one do you need?
- Wave Speed, Wavelength & Frequency Calculator
- Solve v = fλ for wave speed, frequency or wavelength in air, water, glass or vacuum, and get the period, angular frequency and wavenumber alongside it.
- Doppler Effect Calculator
- Find the observed frequency, wavelength and pitch shift in cents when a sound source or listener moves, plus a relativistic mode for light and radar.
- Sound Intensity & Decibel Level Calculator
- Convert between sound intensity, sound pressure and decibel level, then find the level at a new distance or the combined level of several equal sources.
- Snell's Law Refraction Calculator
- Compute the refracted ray angle, critical angle for total internal reflection, Brewster angle and the speed of light in each medium from Snell's law.
- Thin Lens Equation & Magnification Calculator
- Solve 1/f = 1/do + 1/di for image distance, magnification, image height and lens power, and see whether the image is real or virtual, upright or inverted.