Wave Optics mein Huygens principle, YDSE interference, diffraction aur polarisation aate hain. Yahan aapko is chapter ke sabse important formulas aur quick revision points free milte hain — NCERT/CBSE syllabus ke hisaab se, boards aur JEE/NEET dono ke liye.
Important Formulas & Concepts — Wave Optics
- Path difference: Δx = d·sinθ ≈ dy/D
- Bright fringe: Δx = nλ; dark: (2n−1)λ/2
- Fringe width: β = λD/d
- Intensity: I = 4I₀cos²(φ/2)
- Single slit minima: a·sinθ = nλ
- Central maximum width = 2λD/a
- Resolving power aur limit of resolution
- Malus law: I = I₀cos²θ; Brewster: tanθ_p = n
Quick Revision Points
- Constructive: phase diff = 2nπ; destructive: (2n+1)π
- YDSE mein slit width badhao to fringes dim par contrast issues
- Water mein fringe width ghat jati hai (λ ghatta hai)
- Polarisation sirf transverse waves mein — light transverse hai iska proof
- Diffraction central max double width ka hota hai
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FAQ
YDSE numericals kaise practice karu?
β = λD/d ke variations (medium change, slit shift) PDF mein solved hain.
Interference vs diffraction fark?
Do sources vs single slit ke secondary wavelets — PDF mein comparison table hai.
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