Rede Difração

d·sinθ = mλ.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

θ (rad)
0,5236 rad

About this calculator

The Diffraction Grating Calculator is an online tool that helps understand the phenomenon of light diffraction as it passes through a diffraction grating. The formula used is d·sinθ = mλ, where d is the distance between the grating slits, θ is the diffraction angle, m is the diffraction order, and λ is the wavelength of light. With this calculator, it is possible to determine the wavelength of light or the diffraction angle.

Diffraction grating occurs when light passes through a grating of parallel and equally spaced slits. The diffracted light is then separated into different diffraction orders, each with a specific diffraction angle. The formula d·sinθ = mλ relates these parameters and allows calculating the wavelength of light or the diffraction angle.

The Diffraction Grating Calculator is useful in various situations, such as in optical physics experiments, analysis of light spectra, and design of optical instruments. However, it is essential to be careful with the units of measurement used and ensure that the input values are realistic and accurate.

When using the calculator, it is crucial to remember that diffraction grating is sensitive to factors such as slit width, distance between slits, and grating quality. Therefore, the results obtained should be interpreted with care and considered in conjunction with other relevant factors.

Frequently asked questions

What is diffraction grating?

Diffraction grating is an optical phenomenon that occurs when light passes through a grating of parallel and equally spaced slits, resulting in the separation of light into different diffraction orders.

What are the units of measurement used in the formula d·sinθ = mλ?

The units of measurement used are: d (slit distance) in meters, θ (diffraction angle) in radians, m (diffraction order) dimensionless, and λ (wavelength) in meters.

How can I use the Diffraction Grating Calculator?

Just enter the known values into the calculator and solve for the desired parameter.

What are the precautions when using the calculator?

It is essential to verify the units of measurement, ensure that the input values are realistic and accurate, and interpret the results with care.

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