Question

Define: a.dawn b.dusk​

Answer 1

Answer:

Dawn occurs before sunrise, before the top of the Sun reaches the horizon. ... Civil Dawn occurs when the sun is 6° below the horizon and there is enough light for activities to take place without artificial lighting.

Dusk occurs after sunset, once the top of the Sun has passed the horizon.

Answer 2

Answer:

a. the first appearance of light in the sky before sunrise.

b. the darker stage of twilight.

semi-darkness.

Explanation:

The term "dawn" is synonymous with the start of morning twilight. 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.