DoctorReynaldo
- 12
- 0
Simple question...always wondered why it's blue. 
The sky appears blue due to Rayleigh scattering, a phenomenon where light scattering is inversely proportional to the frequency of the light. Blue light, having a shorter wavelength, is scattered more effectively than red light, which has a longer wavelength. This scattering causes the blue color to dominate the sky during the day.
PREREQUISITESStudents of physics, educators explaining optical phenomena, and anyone interested in atmospheric science and color perception.