How to Calculate Diffraction
What is Diffraction?
Diffraction is the bending of waves around obstacles and through openings. It demonstrates that light and other waves don't travel in perfectly straight lines.
Step-by-Step Guide
- 1Enter wavelength, slit width, and distance to screen
- 2The calculator finds diffraction pattern parameters
- 3Results show minima, maxima, and intensity distribution
Worked Examples
Input
λ = 500 nm, a = 0.1 mm, L = 1 m
Result
First minimum: θ ≈ 0.286°
Single slit diffraction
Common Mistakes to Avoid
- ✕Confusing diffraction with refraction
- ✕Using incorrect wavelength units in calculations
Frequently Asked Questions
Why does diffraction matter in optics?
Diffraction limits the resolution of microscopes, telescopes, and cameras. Narrower slits and shorter wavelengths improve resolution.
How does diffraction differ from interference?
Diffraction is light bending around obstacles, while interference is patterns from overlapping waves.
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