Example 10.2: a polaroid P₂ rotated between crossed polaroids P₁ and P₃उदाहरण 10.2: क्रॉस पोलेरॉइड P₁ और P₃ के बीच घुमाया गया पोलेरॉइड P₂Example 10.2: a polaroid P₂ rotated between crossed polaroids P₁ and P₃
NCERT Example 10.2 · 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
- Polaroid P₁ (पोलेरॉइड P₁) — Makes the light polarised; intensity after it = I₀.
- Polaroid P₂ (rotated) (पोलेरॉइड P₂ (घुमाया जाता)) — At angle θ to P₁: transmits I₀ cos²θ.
- Polaroid P₃ (crossed with P₁) (पोलेरॉइड P₃ (P₁ से क्रॉस)) — At (π/2 − θ) to P₂: I = I₀ cos²θ cos²(π/2 − θ) = I₀ cos²θ sin²θ = (I₀/4) sin²2θ.
- Transmitted intensity vs θ (θ के साथ पारगमित तीव्रता) — Zero at θ = 0° and 90°; maximum I₀/4 at θ = 45° (π/4). Without P₂ the crossed pair passes nothing!
Original diagram drawn by Simple Learning Hub, based on NCERT Example 10.2. Report a mistake