Yet Another "Solar Intensity and Angle" Question

The Sun is far to the left. 
Three "flat planets" are shown,
each tilted at a different angle.

On which planet is the solar 
radiation the most intense?

On which planet is the solar 
radiation the least intense?


Most intense: 
Least intense: 


Try another?

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Questions

Credits:
Web Page by Keith Clay
Animation by Keith Clay