Determine the angular dimensions of a sunspot if its dimensions are comparable to the diameter of our Earth, equal to 12,750 km.

Determine the angular dimensions of a sunspot if its dimensions are comparable to the diameter of our Earth, equal to 12,750 km. The radius of the Sun is 7 • 10 ^ 5 km.

decision
D / d = p (c) / p (n); p (n) = d * p (c) / D = 12750 * 30 /1.4*10^6 = 0.28 = 17

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