Physics
Rayleigh Scattering
Quick fact
Rayleigh scattering explains that shorter wavelengths of light, like blue and violet, scatter more than longer ones, such as red or yellow.
Why this is interesting
Have you ever wondered why the sky is blue on a clear day? The answer lies in how light interacts with tiny particles in the atmosphere.
Read the full explanation
Understanding Rayleigh Scattering
Imagine sunlight traveling through Earth's atmosphere. As it does, it collides with small molecules like nitrogen and oxygen. These collisions cause the light to scatter in all directions. Because blue light has a shorter wavelength, it scatters more easily, making the sky appear blue during the day.
A deeper explanation
Rayleigh scattering occurs when light interacts with particles much smaller than its wavelength. The intensity of this scattering is inversely proportional to the fourth power of the wavelength, meaning shorter wavelengths (like blue and violet) are scattered more intensely than longer ones. This principle not only explains the color of the sky but also underpins phenomena such as the reddish hues during sunrise and sunset.