Unlabeled

Sunlight on level ground by the height of the Sun, the air's dimming left out

With the Sun 30 degrees above the horizon, level ground gets half the sunlight it gets with the Sun overhead. At 10 degrees it gets 17%, and that is before the air takes its share.

What does this axis measure?
What does this axis measure?
Sunlight on level ground by the height of the Sun, the air's dimming left out: 19 points, a line chart.
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Sunlight strength (%)
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Sun height (degrees)
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The data: 19 points
Sun height (degrees)Sunlight strength (%)
00
58.7
1017.4
1525.9
2034.2
2542.3
3050
3557.4
4064.3
4570.7
5076.6
5581.9
6086.6
6590.6
7094
7596.6
8098.5
8599.6
90100
Source
Computed: the cosine of the solar zenith angle, zenith = 90° − elevation (NOAA Global Monitoring Laboratory, Solar Calculator glossary); the dimming by the air is left out
Licence
Original computation by Unlabeled; nothing copied from the source
Read
2026-09-28
Drawn
19 points as the puzzle showed them · line
  • Ran in puzzle #15 on October 11, 2026. Play it