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Prism Dispersion

Calculate Prism Dispersion instantly with the exact formula and a worked example.

Prism Dispersion

Prism apex angle°
Refractive index for the blue line
Refractive index for the red line
Blue line wavelengthnm
Red line wavelengthnm
Prism base lengthmm
Angular dispersion Δδ
0.713027°
Calculate Prism Dispersion instantly with the exact formula and a worked example.
Deviation of the blue line
39.14°
Deviation of the red line
38.427°
Angular dispersion
42.8′
Resolving power R
2380

More about: Prism Dispersion

What it calculates

The “Prism Dispersion” calculator computes Angular dispersion Δδ in ° from 6 parameters: prism apex angle (°), refractive index for the blue line, refractive index for the red line, blue line wavelength (nm), red line wavelength (nm), prism base length (mm).

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters Prism apex angle = 60 °, Refractive index for the blue line = 1.52, Refractive index for the red line = 1.51, Blue line wavelength = 486.1 nm, Red line wavelength = 656.3 nm, Prism base length = 50 mm the result is 0.713 °.

How to use

  1. Enter prism apex angle, refractive index for the blue line, refractive index for the red line, blue line wavelength, red line wavelength and prism base length — each field above is adjustable with a slider.
  2. Angular dispersion Δδ (°) 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 Prism Dispersion calculated?
The Prism Dispersion calculator computes Angular dispersion Δδ (in °) from prism apex angle, refractive index for the blue line, refractive index for the red line, blue line wavelength, red line wavelength, prism base length. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Prism Dispersion 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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