Quantum Mechanics calculators
15 calculators De Broglie Wavelength Calculator Find the de Broglie wavelength from velocity, kinetic energy or momentum. Pick a particle preset, switch units, and toggle the relativistic correction for fast beams.
Open Photon Energy Calculator Find photon energy from wavelength, frequency, wavenumber or energy. Get eV, joules, frequency, wavelength, energy per mole, plus photon flux and a spectrum band.
Open Bohr Model Calculator Calculate Bohr model energy levels, orbital radius, electron velocity, and photon wavelength for hydrogen-like ions. Covers H, He+, Li2+ with spectral series identification.
Open Compton Scattering Calculator Calculate Compton scattering: wavelength shift, scattered photon energy, recoil electron energy and angle, energy loss fraction, and Klein-Nishina cross section.
Open Compton Wavelength Calculator Calculate the Compton wavelength and reduced Compton wavelength of any particle from its mass. Add a scattering angle to get the wavelength shift and energy transfer.
Open Curie Constant Calculator Calculate the Curie constant C for any paramagnetic material from number density, g-factor and quantum number J. Also finds effective magnetic moment and chi.
Open Fermi Level Calculator Calculate the Fermi level in intrinsic and doped semiconductors. Get carrier concentrations, thermal voltage, and band-edge positions for silicon, germanium, and GaAs.
Open Frequency of Light Calculator Calculate the frequency of light from wavelength, or solve for energy per photon in eV and joules. Instant EM spectrum region, step-by-step math, and reference table.
Open Heisenberg's Uncertainty Principle Calculator Calculate position-momentum or energy-time uncertainty using Heisenberg's principle. Solve for any variable, with worked steps and real particle examples.
Open Hydrogen Energy Levels Calculator Calculate hydrogen and hydrogen-like atom energy levels, transition energy, photon wavelength, and frequency using the Bohr model. Supports H, He+, Li2+ and more.
Open Magnetic Moment Calculator Calculate the magnetic moment of a current loop, solenoid, or coil. Also compute torque in a field, potential energy, and quantum orbital or spin moments.
Open Photoelectric Effect Calculator Calculate photon energy, max kinetic energy, stopping potential, and threshold frequency for the photoelectric effect. 14 preset metals, instant results.
Open Rydberg Equation Calculator Calculate the wavelength, frequency, wavenumber, and photon energy of light from hydrogen and hydrogen-like atoms using the Rydberg equation, with step-by-step math.
Open Stefan-Boltzmann Law Calculator Stefan-Boltzmann law calculator: get radiated power from T, area and emissivity, or reverse-solve for T. Material emissivity presets and Wien peak wavelength included.
Open Wien's Law Calculator Calculate peak emission wavelength from blackbody temperature, or reverse-solve temperature from wavelength. Shows frequency, spectral region, and stellar type.
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