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Q. The angle of $1'$ (minute of arc) in radian is nearly equal to

NEETNEET 2020Physical World, Units and Measurements

Solution:

$1=\left(\frac{1}{60}\right)^{\circ}=\frac{1}{60}\times\frac{\pi}{180}$ radian
$=2.91\times10^{-4}$ radian