physics·NCERT Class 12·Wave Optics
Young's Double-Slit
Medium+70 XP
Two tiny slits, one light source — and you get bright bands on the screen. Why stripes? Because light behaves as a WAVE and interferes with itself.
›Fringe width β = λD/d (λ = wavelength, D = screen dist, d = slit sep).
›Constructive interference: path diff = nλ; destructive: (n+½)λ.