Calculates the energy of a single photon based on its frequency or wavelength (E=hf or E=hc/λ).
Start with your values, or try a preset.
Enter Frequency (Hz) and Wavelength (m) in the units shown.
Read Speed of Light (m/s), Planck's Constant (J⋅s), Photon Energy (from Wavelength, J), and Photon Energy (from Frequency, J) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Frequency (Hz): 3,000,000,000,000,000 Hz; Wavelength (m): 0.0000001 m
Speed of Light (m/s): 299,792,458 m/s; Planck's Constant (J⋅s): 0.0000000000000000000000000000000006626 J⋅s; Photon Energy (from Wavelength, J): 0.000000000000000001986424827 J; Photon Energy (from Frequency, J): 0.0000000000000000019878 J
Frequency (Hz): 566,000,000,000,000 Hz; Wavelength (m): 0.00000053 m
Speed of Light (m/s): 299,792,458 m/s; Planck's Constant (J⋅s): 0.0000000000000000000000000000000006626 J⋅s; Photon Energy (from Wavelength, J): 0.0000000000000000003747971371 J; Photon Energy (from Frequency, J): 0.0000000000000000003750316 J
Frequency (Hz): 429,000,000,000,000 Hz; Wavelength (m): 0.0000007 m
Speed of Light (m/s): 299,792,458 m/s; Planck's Constant (J⋅s): 0.0000000000000000000000000000000006626 J⋅s; Photon Energy (from Wavelength, J): 0.0000000000000000002837749752 J; Photon Energy (from Frequency, J): 0.0000000000000000002842554 J
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