On a summer evening at middle latitudes, twilight adds about how much time to the length of daylight?

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Quizplus · Accepted Answer

Twilight at middle latitudes can add about 30 minutes to the length of daylight. This is because twilight is the period of time when the sun is below the horizon but its rays still illuminate the sky. There are three types of twilight: civil, nautical, and astronomical, and each lasts longer than the previous one. At middle latitudes, civil twilight can last up to 30 minutes after sunset, which means that daylight can be extended by the same amount of time.

On a Summer Evening at Middle Latitudes, Twilight Adds About