Input interpretation
![calcium | threshold frequency](../image_source/a67b9abf518528eee9e8f9882c840be9.png)
calcium | threshold frequency
Result
![6.94×10^14 Hz (hertz)](../image_source/ae323a73791c4cf85ae10fb685211a03.png)
6.94×10^14 Hz (hertz)
Work functions
![2.87 eV](../image_source/17d43a522600b177f1453b9174e8084a.png)
2.87 eV
![polycrystalline | 2.87 eV](../image_source/d1ff1014ecb633fce3f52af8ec256f1b.png)
polycrystalline | 2.87 eV
Electromagnetic frequency range
![visible light](../image_source/6bb394e02c2b85470b005789cce399c6.png)
visible light
![visible light](../image_source/6dcf764abb1402e414c4eb5b486357cf.png)
visible light
Unit conversion
![694 THz (terahertz)](../image_source/e376d681247873a544d3ca484167519f.png)
694 THz (terahertz)
Comparison as frequency
![≈ ( 0.21 ≈ 1/5 ) × Rydberg frequency ( 3.2898419603×10^15 Hz )](../image_source/e8c3461d32c7f35ee6d536388953abe3.png)
≈ ( 0.21 ≈ 1/5 ) × Rydberg frequency ( 3.2898419603×10^15 Hz )
Corresponding quantities
![Wavelength λ of electromagnetic radiation from λ = c/ν: | 432 nm (nanometers) | 4.3×10^-7 meters | 1.7×10^-5 inches](../image_source/66fd16e2feb6b1b5441e72fb11501f5c.png)
Wavelength λ of electromagnetic radiation from λ = c/ν: | 432 nm (nanometers) | 4.3×10^-7 meters | 1.7×10^-5 inches
![Spectroscopic wavenumber of electromagnetic radiation ν^~ from ν^~ = ν/c: | 23148 cm^(-1) (reciprocal centimeters)](../image_source/e2842afa4494310a7dcb599bbabf113c.png)
Spectroscopic wavenumber of electromagnetic radiation ν^~ from ν^~ = ν/c: | 23148 cm^(-1) (reciprocal centimeters)
![Angular frequency ω from ω = 2πν: | 4.36×10^15 rad/s (radians per second)](../image_source/34977c3fc38eeabfc5089de604a3cc03.png)
Angular frequency ω from ω = 2πν: | 4.36×10^15 rad/s (radians per second)
![Photon energy E from E = hν: | 2.9 eV (electronvolts)](../image_source/55baba02251fcba033051c8de0606fc8.png)
Photon energy E from E = hν: | 2.9 eV (electronvolts)