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प्रश्न
The minimum angular separation between two stars is 4 × 10−6 rad, if telescope is used to observe them with an objective of aperture 16 cm. Find the wavelength of light used.
उत्तर
dθ = 4 × 10−6 rad, a = 16 cm = 16 × 10−2 m
The wavelength of light used is 5246 Å.
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