why is the sky blue? – Sodium Zone

Question: why is the sky blue?
- Keywords:
  colour,
  sky
Asked by item45gas to Souvik, John, Sabine, Maria, Faye, Armin on 15 Nov 2019. This question was also asked by free45gas, gain45gas, knit45pie.
- Maria McNamara answered on 15 Nov 2019:
  
  Because of Tyndall scattering of blue wavelengths of light from microscopic dust particles in the upper atmosphere.

Question: why is the sky blue?