EVERYDAY CLARITY
Diffraction Calculator
What is the first single-slit diffraction minimum angle? Enter the stated values to calculate this model.
Your result
First minimum angle
degree
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Wavelength (m) | Enter wavelength in m; use the same basis as the other measurements. |
| Slit width (m) | Enter slit width in m; use the same basis as the other measurements. |
Understanding your result
Read First minimum angle (degree) in the units and model stated on this page. The formula ratio=wavelength/width · angle=asin(min(1,ratio))*180/pi defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What is the first single-slit diffraction minimum angle?
What is the first single-slit diffraction minimum angle? Enter the stated values to calculate this model.
Common uses
- What is the first single-slit diffraction minimum angle
How it works
ratio=wavelength/width; angle=asin(min(1,ratio))*180/pi
Worked example
Enter Wavelength: 5e-7 m; Slit width: 0.000001 m. Results: First minimum angle: 30 degree.