alleryResolving power of telescope is given by Rayleigh criterion:
Aθ_min = D/λ
Bθ_min = 1.22 λ / D (D = aperture diameter)
CIndependent of λ
Dθ_min ∝ λ × D (D = aperture)
Answer & Solution
Correct answer: B. θ_min = 1.22 λ / D (D = aperture diameter)
**Rayleigh criterion:** minimum resolvable angle = 1.22 λ/D for circular aperture.
Larger telescope and shorter wavelength give better resolution.
(Why astronomers build huge telescopes.)
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