SUN PATH

6. The architectural term for light-admitting openings
8. Devices designed to control solar gain and shading
10. Design strategy that optimizes natural light while minimizing glare
13. The physical process by which light is redirected or absorbed by surfaces
14. The phenomenon of light being reflected off surfaces
15. Illumination derived from all parts of the sky, especially on cloudy days
16. Optical effect causing light to bend when passing through different mediums
18. The angle between the incoming solar radiation and a surface
19. The variation of sunlight based on the Earth's axial tilt
20. The optimal angle for solar energy capture, based on geographic latitude
21. Mathematical model representing the sun's position over time

1. Light that travels directly from the sun to a surface, unimpeded
2. Unit of measure representing the amount of light emitted by a source
3. The event marking equal day and night length
4. The efficacy of daylighting in relation to energy consumption
5. The dispersion of light into its component colors
7. The day with the shortest daylight hours in winter
9. Projection method that represents solar angles in two dimensions
11. The maximum angle above the horizon that the sun can reach
12. Type of light affected by atmospheric particles, leading to a reduction in intensity
17. Ratio of indoor illuminance to that from an unobstructed sky, expressed as a percentage
20. Standard unit for measuring illuminance in a given area