at the poles
Obliquely
I think that the word you want is perpendicular rays, the rays of sunlight hitting the Earth when the Sun is directly overhead. This point is always within the tropics.
Tropic of cancer
the sun produce ultraviolet rays which strike the earth surface.
90 degrees
The Sun's rays strike least directly at the poles.
at the poles
Directly is near the equator. Least directly is at the poles.
Directly is near the equator. Least directly is at the poles.
at the Equator
spring/fall
i think it was at the equator or poles
the rays of the sun strike most directly at the equator, which is also why the countrie son it are the hottest. Also, the equator is perpendicular to the axis of rotation of the Earth and the sun so the sun hits it directly at 90 degrees. The equator sees the sun for most of the day (24 hours).
On earth North Pole And South Pole In Soler System Pluto
Absorbed
Absorbed
Obliquely