The distance of sun from the earth is 1.496×10^21 m . If the angular diameter of sun is 2000" , find the diameter of sun
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= 1.496 * 10^11 meterstan δ/2 = (d/2) / D δ in radians = δ in arc seconds / 3600 * π/180 = 1920/3600* π/180 radiansd = 2 D tan δ/2 = 1.39*10^9 meters= 1.390 &10^6 km Earth's diameter = 12,742 km Sun's diameter is around 109 times Earth's. so it is 1388872 km= 1.388 * 10^6 km.
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