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Young's Double-Slit

Calculate Young's Double-Slit instantly with the exact formula and a worked example.

Young's Double-Slit

λ, nm
Slit spacing d, µm
Screen distance L, m
Fringe spacing, mm
11
Calculate Young's Double-Slit instantly with the exact formula and a worked example.

More about: Young's Double-Slit

What it calculates

The “Young's Double-Slit” calculator computes Fringe spacing, mm from 3 parameters: λ, nm, slit spacing d, µm, screen distance l, m.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters λ, nm = 550, Slit spacing d, µm = 100, Screen distance L, m = 2 the result is 11.

How to use

  1. Enter λ, nm, slit spacing d, µm and screen distance l, m — each field above is adjustable with a slider.
  2. Fringe spacing, mm is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Young's Double-Slit calculated?
The Young's Double-Slit calculator computes Fringe spacing, mm from λ, nm, slit spacing d, µm, screen distance l, m. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Young's Double-Slit calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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