Single/double-slit pattern API

Computes double-slit (Young) bright-fringe spacing Δy = λL/d or single-slit central-maximum width from a·sinθ = λ, on a distant screen. Answers 'How far apart are the interference fringes?', 'How wide is the central diffraction band?'.

Price$0.04per request

MethodPOST

Route/v1/engineering/slit-interference

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

opticsdiffractioninterferencedouble-slitsingle-slityoungfringephysics

API URLhttps://x402.hexl.dev/v1/engineering/slit-interference

Integration docs

Example request

{
  "mode": "double",
  "wavelengthNm": 650,
  "slitSpacingMm": 0.2,
  "screenDistanceM": 2
}

Example response

{
  "mode": "double",
  "fringeSpacingM": 0.0065,
  "fringeSpacingMm": 6.5,
  "firstMaximumAngleDeg": 0.18621,
  "interpretation": "Adjacent bright fringes are 6.5 mm apart on the screen."
}

Input schema

{
  "type": "object",
  "required": [
    "wavelengthNm",
    "screenDistanceM"
  ],
  "properties": {
    "mode": {
      "type": "string",
      "enum": [
        "double",
        "single"
      ],
      "description": "Pattern type (default double)",
      "examples": [
        "double"
      ]
    },
    "wavelengthNm": {
      "type": "number",
      "description": "Wavelength (nm)",
      "examples": [
        650
      ]
    },
    "slitSpacingMm": {
      "type": "number",
      "description": "Slit separation d for double-slit (mm)",
      "examples": [
        0.2
      ]
    },
    "slitWidthMm": {
      "type": "number",
      "description": "Slit width a for single-slit (mm)",
      "examples": [
        0.1
      ]
    },
    "screenDistanceM": {
      "type": "number",
      "description": "Distance to screen L (m)",
      "examples": [
        2
      ]
    }
  }
}

Output schema

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