What causes the base of a very deep or dense cloud layer to appear gray or dark?
Answer
Less light penetrates all the way through to the bottom
When a cloud is very deep or dense, many layers of suspended liquid/ice scatter sunlight, preventing significant light penetration to the base, causing it to appear gray or dark.
#Videos
NASA Spotlite: What are clouds made of? - YouTube
Related Questions
What physical state constitutes the visible mass of an Earth cloud?What makes up the vast majority of the mass in a cubic meter of a typical cumulus cloud?What two gases primarily compose Earth’s dry atmosphere by volume?What must happen to water vapor gas for condensation to begin forming cloud droplets?What microscopic surfaces are essential for water vapor molecules to condense onto during cloud formation?What mechanism is responsible for a cloud appearing white to an observer?If the temperature high in the troposphere remains below freezing, what state does water vapor deposit into?What causes the base of a very deep or dense cloud layer to appear gray or dark?What is the primary composition of an interstellar molecular cloud?What is the approximate diameter of a typical cloud droplet?