Photon energy E=hf API

Computes photon energy E = h·f = h·c/λ from frequency or wavelength, in both joules and electron-volts, with the complementary frequency/wavelength. Answers 'How much energy does a 500 nm photon carry?', 'What is the eV of this light?'.

Price$0.02per request

MethodPOST

Route/v1/engineering/photon-energy

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

wavesphotonenergyplanckelectron-voltquantumlightphysics

API URLhttps://x402.hexl.dev/v1/engineering/photon-energy

Integration docs

Example request

{
  "wavelengthNm": 500
}

Example response

{
  "energyJoules": 3.9728917142978563e-19,
  "energyEv": 2.479684,
  "frequencyHz": 599584915999999.9,
  "wavelengthNm": 500,
  "interpretation": "Each photon carries 2.48 eV (3.973e-19 J)."
}

Input schema

{
  "type": "object",
  "properties": {
    "frequencyHz": {
      "type": "number",
      "description": "Frequency (Hz)",
      "examples": [
        599000000000000
      ]
    },
    "wavelengthNm": {
      "type": "number",
      "description": "Wavelength (nm), alternative to frequency",
      "examples": [
        500
      ]
    }
  },
  "description": "Provide exactly one of frequencyHz or wavelengthNm."
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}