* Angle of Incidence: Solar radiation hits the Earth at different angles depending on latitude. At the equator, the sun's rays strike the Earth at a nearly perpendicular angle (close to 90 degrees). This means the energy is concentrated over a smaller area. As you move towards the poles, the angle of incidence decreases, spreading the same amount of energy over a larger area. This results in lower solar radiation intensity.
* Duration of Daylight: The length of the day also varies with latitude. Equatorial regions experience roughly 12 hours of daylight throughout the year. As you move towards the poles, the length of day varies significantly, with the poles experiencing 24 hours of daylight during their respective summer solstices and 24 hours of darkness during their winter solstices. This difference in daylight hours directly affects the total amount of solar radiation received.
In summary, the combination of the angle of incidence and the duration of daylight leads to regions farther from the equator receiving less solar radiation than the equatorial regions.
