How to Calculate and Solve for Wavelength | Bragg’s Law

Last Updated on January 14, 2023

The image above represents wavelength.

To compute for wavelength, three essential parameters are needed and these parameters are Order of Reflection (n), Inter-atomic Spacing (d) and Angle of Diffraction (θ).

The formula for calculating wavelength:

λ = 2dsinθ/n


λ = Wavelength
n = Order of Reflection
d = Inter-atomic Spacing
θ = Angle of Diffraction

Given an example;
Find the wavelength when the order of reflection is 2, the inter-atomic spacing is 10 and the angle of diffraction is 12.

This implies that;

n = Order of Reflection = 2
d = Inter-atomic Spacing = 10
θ = Angle of Diffraction = 12

λ = 2dsinθ/n
λ = 2(10)sin(12°)/2
λ = 20(0.207)/2
λ = (4.158)/2
λ = 2.079

Therefore, the wavelength is 2.079 m.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the wavelength.

To get the answer and workings of the wavelength using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web –

To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via

Android (Paid) –
Android (Free) –

Apple (Paid) –
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.

Now, Click on X-Ray Diffusion under Materials and Metallurgical

Now, Click on Bragg’s Law under X-Ray Diffusion

Now, Click on Wavelength under Bragg’s Law

The screenshot below displays the page or activity to enter your values, to get the answer for the wavelength according to the respective parameter which is the Order of Reflection (n),  Inter-atomic Spacing (d) and Angle of Diffraction (θ).

Now, enter the values appropriately and accordingly for the parameters as required by the Order of Reflection (n) is 2, Inter-atomic Spacing (d) is 10 and Angle of Diffraction (θ) is 12.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the wavelength and presents the formula, workings and steps too.

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