When Viewed from Earth,Venus Subtends an Angle of About 1

When viewed from Earth,Venus subtends an angle of about 1 arc minute (1/60°) when it is at the closest point to Earth in its orbit.If you were watching Venus set in the west over a clear horizon (e.g.,ocean) ,how long would Venus take from the time it first reached the horizon to completely disappear below the horizon?

A) It would be almost instantaneous (much less than 1 second) .
B) second
C) about 4 minutes
D) about 4 seconds

Correct Answer:

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