Input interpretation
cesium | work function
Results
1.95 eV
polycrystalline | 1.95 eV
Threshold frequency
4.715×10^14 Hz (hertz)
Electromagnetic frequency range
visible light
Unit conversion
3.12×10^-19 J (joules)
Comparisons as energy
≈ (0.2 to 1) × energy of a covalent bond ( 3×10^-19 to 1×10^-18 J )
≈ (0.7 to 0.8) × energy of a photon of green light ( 2.2 to 2.5 eV )
≈ (1 to 1.5) × energy of an infrared light photon ( 2×10^-19 to 3×10^-19 J )
Corresponding quantities
Electromagnetic wave frequency ν from E = hν: | 472 THz (terahertz) | 4.715×10^14 Hz (hertz)
Thermodynamic temperature T from E = kT: | 22629 K (kelvins)
Photon wavelength λ from E = hc/λ: | 636 nm (nanometers)
Spectroscopic wavenumber ν^~ from ν^~ = E/(hc): | 1.573×10^6 m^(-1) (reciprocal meters) | 15728 cm^(-1) (reciprocal centimeters)