A binary star system consists of two stars separated by a distance s. An astronomer observes them from Earth using a telescope with an objective lens of diameter D at a wavelength λ . Later, a deep-se

Question

A binary star system consists of two stars separated by a distance s. An astronomer observes them from Earth using a telescope with an objective lens of diameter D at a wavelength λ . Later, a deep-sea probe observes two bioluminescent organisms at the same separation s and same distance L as the stars, but underwater (refractive index n). Which of the following statements is/are correct regarding the resolving power (RP) and the Rayleigh criterion?

TestHub · Accepted Answer

Rayleigh criterion: θ = 1.22 D λ ​ , so s ≈ 1.22 D L λ ​ (A) correct (B) underwater λ ′ = n λ ​ , so resolving power is n times: correct (C) blue has smaller λ , so the limit of resolution decreases: incorrect (D) s ∝ D L λ ​ , so doubling L needs doubling D: correct Options (A), (B), (D)

Physics - Wave Optics Question with Solution | TestHub

Options:(select one or more)

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