Why Are Man-Made Lakes Blue?
Blue water lakes contain low concentrations of algae and other substances, resulting in high clarity and a deep blue color. Water molecules absorb longer, visible wavelengths (e.g. red light, 600-700 nm) while shorter, blue wavelengths (< 500 nm) pass deeper into the water column. [embed]https://youtube.com/watch?v=jEaTW8OGvz0[/embed] What makes Great Lakes blue? The blue in Lake Michigan …