That happens at some point on the equator, at a single moment,
on two days of the year ... near March 21 and near September 21.
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).
It strikes it most directly at the equator, on average during the year.
It is the place where the Sun is always closer than anywere else
The top of Everest, K2, Kilimanjaro or any high mountain. This is due to a lack of particulates in the air to filter the rays out and of course because they are closer to the sun. Although the Equatorial region of the Earth may be the hottest, the actual difference in distance between the Equator and Everest is negligible if you consider how far the suns rays have travelled to get to us in the first place.
Each beam of sunlight has the same amount of energy (which is where we get our warmth). The energy of the sun is more spread accross the Earth's surface with increased angles (oblique). This is what happens at the poles where the sun light hits the Earth at 180 degrees. It is cold at the poles because the sun's energy is spread out over a large area. As the angle of the sun decreases the energy of the sun hits the earth directly and is concentrate. This is what happens when the sun hits the equator at 90 degrees and that is why it is warm at the equator.
Directly is near the equator. Least directly is at the poles.
The rays of the sun strike the Earth most directly at the equator, where sunlight is nearly perpendicular to the surface. This results in more concentrated heat and higher temperatures in these regions.
spring/fall
The sun's rays strike Earth most directly at the equator, where sunlight is more concentrated due to the curvature of the Earth and the angle of incidence. The sun's rays strike Earth least directly at the poles, where sunlight is spread out over a larger surface area and travels through a thicker layer of atmosphere, resulting in lower intensity.
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).
The Equator is directly facing towards the Sun, and so the Sun's rays hits the Equator more directly. As you move north or south, away from the Equator, the Sun's ray hit the Earth at a sharper angle. With further to travel through our atmosphere, the rays are cooler when they strike the Earth.
the sun's radiation is concentrated in smaller area near the equator
Not always. The sun is directly overhead at the equator at the spring and fall equinoxes.
The Sun's rays strike least directly at the poles.
Close to perpendicular.
The sun is most directly overhead near the equator. This happens during the equinoxes where the sun is directly above the equator, resulting in near-vertical rays at noon.
The sun is north of the equator for 6 months every year, and south of the equator during the other 6 months. In order to accomplish these gyrations, it crosses the equator twice a year ... on March 21 moving north, and on September 22 moving south.