Book 30, Question 13
Why is Lake Louise such a glowing blue-green?
Lake Louise in Alberta is fed by glaciers high in the Rockies.
As the ice moves over rock, it grinds it into a fine powder called rock flour. Meltwater carries the flour into the lake, where it stays floating in the water. Sunlight bounces off the tiny particles, scattering the blue and green wavelengths and giving the lake its milky turquoise color.