Single-Slit Diffraction Using Wavelength and Intensity Ratio
Singleslit diffraction is when light passes through a narrow slit and creates an interference pattern on the other side.
The normalized transmitted intensity equals the square of the sinc of the product of \[Pi], the slit width divided by the wavelength and the sine of the diffraction angle.
Formula
![QuantityVariable[Subscript[Style["I", Italic], "θ"]/Subscript[Style["I", Italic], "0"], "Unitless"] == Sinc[(Pi*QuantityVariable["d", "Distance"]*Sin[QuantityVariable["θ", "Angle"]])/QuantityVariable["λ", "Wavelength"]]^2](https://www.wolframcloud.com/objects/resourcesystem/marketplacestorage/resources/44c/44cbaba2-15bd-4241-ae0b-dce3a55284a9/Webpage/FormulaImage.png "Copy to Clipboard")
| symbol | description | physical quantity |
|---|---|---|
| Iθ/I0 | normalized transmitted intensity | "Unitless" |
| d | slit width | "Distance" |
| λ | wavelength | "Wavelength" |
| θ | diffraction angle | "Angle" |