Sunlight at the equator is incident at right angles to the Earth, whereas sunlight at the poles is incident at grazing angles.
(Sunlight at the equator; is; incident; L:at right angles to the Earth) (sunlight at the poles; is; incident at grazing angles)
Sunlight at the equator sunlight at the poles
is is
incident L:at right angles to the Earth
incident at grazing angles