Single-slit minima (a sin θ = nλ (minima n=1)
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a sin θ = nλ (minima n=1
What each symbol means
| Symbol | What it stands for |
|---|---|
| a | Width of single slit (m) |
| n | Order of minimum (non-zero integer for standard minima condition) |
| \theta | Angular position of diffraction minimum from central axis |
| \lambda | Wavelength (m) |
When to use this
Standard JEE / NCERT assumptions unless stated (paraxial, thin lens, coherent YDSE sources, etc.).