A person wishes to distinguish between two pillars located at a distance of 11 km. what should be the minimum distance between these pillars? [R. L. = 1'(one minute)]
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Question

A person wishes to distinguish between two pillars located at a distance of 11 km. what should be the minimum distance between these pillars? [R.L. = 1'(one minute)]

G1 Physics · Accepted Answer

A resolution limit of 1 minute corresponds to θ≈π/(180×60) rad. Minimum separation s≈Lθ=11×10³×π/10800≈3.2 m. Hence option C.