Wave Phenomena and Light
NIOS · Class 12 · Physics
All formulas from Wave Phenomena and Light in NIOS Class 12 Physics. Key equations, constants, and identities for board exam preparation.
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Interference of Light — Young's Double Slit Experiment
I ∝ 4a² cos²(δ/2)
A = 2a cos(δ/2)
Δ = (λ/2π) × δ
Δ = d sinθ ≈ xd/D
(xₙ)bright = nλD/d
Diffraction of Light — Single Slit
Condition for minima: a sinθ = nλ (n = ±1, ±2, ...)
Width of central maximum = 2λD/a
Polarisation of Light and Brewster's Law
μ = tan iₚ (Brewster's Law)
iₚ + r = 90°
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