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For Researchers · Single-Slit Diffraction

Single-Slit Diffraction for an anti-reflective coating

Built for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model. Simulate an anti-reflective coating live below — adjust the inputs and watch it respond, right in your browser.

Single-Slit DiffractionLive

light bending around edges

Controls

Presets

Slit width (µm)

Wavelength (nm)

Send light through a narrow slit and it fans out into a bright central band flanked by dimmer fringes — diffraction. The pattern follows a sinc-squared curve, with the first dark fringe where the path difference across the slit equals one wavelength. Narrower slits spread the light more, the diffraction limit that caps every lens and telescope's sharpness.

▶ Run in Python

Data Inspector

First minimum1.6°

Central width3.2°

Slit/λ36.4

Governing equation

I = I_{0} sinc^{2} β, β = \frac{π a sin θ}{λ}, a = 20 μ m, λ = 550 nm

Reading this result: Wide slit relative to the wavelength: the central peak is tight and the beam stays nearly collimated, with only faint fringes.

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Frequently asked questions

Is this good for researchers?: Yes — this version of "Single-Slit Diffraction for an anti-reflective coating" is framed for researchers prototyping or validating an idea. Prototype fast, reproduce exactly, and share a citable, interactive version of your model.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.