Find a term from the labs, understand the process behind it, and see how it appears in the landscape. Each entry connects an explanation with a real observation and a model you can explore.
Term
Incidence
The angle between incoming radiation and the surface normal. A larger incidence angle spreads the same beam over more ground; solar altitude is measured above the horizon instead.
What to look for
Sunlight passing through Earth's atmospheric limb in an ISS photograph. At low solar angles, light crosses a longer atmospheric path and spreads across a larger surface area.
