Why is the Moon seen reddish at the time of its rise and set?

(N/A) When the Moon is near the horizon, its light has to travel through a much larger distance in the Earth's atmosphere compared to when it is overhead.
According to Rayleigh's law of scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength $(I \propto 1/\lambda^4)$.
As the light travels through the thicker layers of the atmosphere, most of the blue and shorter wavelengths are scattered away by air molecules and fine particles.
The light that reaches our eyes is primarily composed of longer wavelengths, such as red, which undergo the least scattering.
Consequently, the Moon appears reddish when it is near the horizon during its rise or set.