* Clearer skies: Fall often brings drier air and fewer clouds, allowing more sunlight to reach the ground.
* Lower sun angle: As the sun moves lower in the sky during fall, the light travels through less atmosphere to reach us, resulting in less scattering and a more intense appearance.
* Psychological factors: People may associate the warmth and vibrancy of fall colors with the feeling of a brighter sun, even if it's not actually brighter.
In fact, the sun's output actually slightly decreases in the fall. This is because the Earth is moving further away from the sun in its elliptical orbit. However, this change is small and not noticeable to the human eye.
So, while it might feel like the sun is brighter in the fall, it's more likely due to factors like clearer skies and the lower sun angle.
