Which of the following is true about equinoxes? a. they occur in june and december b. the sun’s vertical rays are striking either 23.5°s or 23.5°n c. days and nights are equal in length everywhere d. the length of daylight in the arctic and antarctic circles is 24 hours

In equinoxes, the nights and days are equivalent in length everywhere.

It is defined as the time when the plane of the equator of the Earth passes via the geometric center of the Sun's disk. This takes place two times every year, that is, around 20th March and 23rd September. It is the time, when the visible Sun's center is directly over the equator.

Equinox in other words is known as equal night. There are two equinoxes, that is, autumnal equinox and vernal equinox. The falling of the Sun rays takes place directly over the equator at noon, when the sun crosses celestial equator. Therefore, there is equivalent length of night and day in the two hemisphere.

Thus, the correct answer is option C, that is, days and nights are equal in length everywhere.

Find out more information about equinox here:

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C. Days and nights are equal in length everywhere.

the areas around the equator