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Question: Graphs for deflection for rays are given for appropriate angles. Here deflection is measured against...

Graphs for deflection for rays are given for appropriate angles. Here deflection is measured against the angle of incidence.

A

(A) Plane mirror

B

(B) Prism

C

(C) Rarer to denser medium

D

(D) Denser to rarer medium

Answer

(A)-(i), (B)-(iii), (C)-(ii), (D)-(iv)

Explanation

Solution

  1. Plane Mirror: δ=180∘−2i\delta = 180^\circ - 2i. Linear decrease. Matches graph (i).
  2. Prism: U-shaped curve with a minimum deviation. Matches graph (iii).
  3. Rarer to Denser: δ=i−r\delta = i - r. Increasing curve with increasing slope. Matches graph (ii).
  4. Denser to Rarer: δ=r−i\delta = r - i (refraction), then δ=180∘−2i\delta = 180^\circ - 2i (TIR). Increasing curve with increasing slope followed by linear decrease. Matches graph (iv).