Atmospheric density and altitude also affect sunlight.
Sunburn is more absorbed in dense environments. While less absorbed in thin environments.
At the equator, the atmosphere becomes thinner and thicker towards the poles.
So the amount of sunlight on the Earth's surface decreases as it moves from the equator to the poles.
The diagonal rays of the sun pass through a longer atmospheric area and reach the earth. And lose more heat along the way.
It therefore gives less sunlight to the respective region.
The direct rays of the sun pass through the shorter length of the atmosphere and lose less heat along the way thus giving less sunlight to the respective region.
The direct rays of the sun pass through the layer at a short length to the atmosphere. And lose less heat along the way.
Therefore gives more sunshine to the respective region.
This is why the amount of sunscreen moving from the equator to the poles gradually decreases.
Thus, the density and altitude of the atmosphere also affect sunlight.