Single-slit diffraction: broad central maximum, minima at θ = ±λ/a, ±2λ/a, …एकल झिरी विवर्तन: चौड़ा केंद्रीय उच्चिष्ठ, निम्निष्ठ θ = ±λ/a, ±2λ/a, … परSingle-slit diffraction: broad central maximum, minima at θ = ±λ/a, ±2λ/a, …
NCERT Fig 10.15 · Class 12 Physics · Chapter 10 · interactive diagram
Read Chapter 10 with this diagramइस डायग्राम के साथ अध्याय 10 पढ़ेंIs diagram ke saath Ch 10 padhiyeAll Physics diagramsसभी भौतिकी डायग्रामSaare Physics diagrams
Parts and what they mean
- Diffraction pattern (विवर्तन पैटर्न) — Bright broad centre, then fainter bands on both sides (computed).
- Intensity curve (तीव्रता वक्र) — Computed from I = I₀ (sin β/β)², β = πa sin θ/λ (beyond the book; the book gives the positions).
- Central maximum (केंद्रीय उच्चिष्ठ) — At θ = 0 all parts of the slit add in phase: brightest point.
- Minima (निम्निष्ठ) — Zero intensity at θ ≈ nλ/a, n = ±1, ±2, ±3, …
- Secondary maxima (द्वितीयक उच्चिष्ठ) — Near θ ≈ (n + ½)λ/a, getting weaker and weaker with n (the first is only about 4.7% of the central one).
- Width of the central maximum (केंद्रीय उच्चिष्ठ की चौड़ाई) — Angular width 2λ/a (between the first minima). On a screen at distance D: 2λD/a. Narrower slit → wider spread.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 10.15. Report a mistake