Intensity of Sunlight (at 45º N), in a 40-day year.

The sun is off-screen, far to the left.
The time shown is in hours.
One "year" = 40 days = 960 hours.
City (red circle) has a latitude of 45º N.

Speed up the animation. Make 2 years fly by.

Don't speed up. Go on to the next animation.

Use the buttons above to control the animation.

Credits:
Web Page by Keith Clay
Animation by Keith Clay