Question

what is twilight,dawn & dusk​

Answer 1

Answer:

mean?

Dawn is the point at which it becomes possible to detect light in the sky, when the sun is 18° below the horizon.

Twilight is the name given to the period between dawn and sunrise, or between sunset

Dusk, when light is still visible in the sky due to sunlight scattering off the atmosphere.

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Answer 2

Answer:

Technically, "dusk" is the period of twilight between complete darkness and sunrise (or sunset). In common usage, "dawn" refers to morning, while "dusk" refers only to the evening twilight.

Explanation:

You can define twilight simply as the time of day between daylight and darkness, whether that's after sunset, or before sunrise. It's a time when the light from the sky appears diffused and often pinkish. The sun is below the horizon, but its rays are scattered by Earth's atmosphere to create the colors of twilight