alleryDispersion of light by prism: angular dispersion (δ_violet - δ_red) for thin prism:
A0
B(n_v - n_r) A
C(n_v + n_r) A
DA only
Answer & Solution
Correct answer: B. (n_v - n_r) A
For thin prism: δ = (n - 1)A. So δ_v - δ_r = (n_v - n_r) A. Dispersive power ω = (n_v - n_r)/(n_y - 1).
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