Question

why is the duration of twilight longer in high latitudes than at the equated?​

Answer 1

The Sun sinks below the horizon rapidly. In the middle and high latitudes the duration of twilight is long because at these latitudes the Sun has an inclined path. ... Both twilight and dawn continue so long as the sun is 18° below the horizon

Answer 2

Explanation:

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Yes, twilight is shorter at the equator and longer closer to the poles. The reason is the angle of the ecliptic – or path of the sun, moon and planets across our sky. As seen from equatorial latitudes, the sun drops quickly down toward the horizon – and it just as quickly sinks below the horizon.