Part 6/10:
This data accounts for people experiencing true night, not twilight. Therefore, the claim that "99% of the world's population sees sunlight" is technically accurate if we include all stages of twilight, not just direct sunlight.
The Role of Earth's Atmosphere and Light Reflection
Earth's atmosphere plays a pivotal role in diffusing sunlight. Even areas in permanent or near-permanent twilight receive some scattered and reflected light. The atmosphere acts like a giant diffuser, allowing indirect sunlight to illuminate the night side faintly. This explains how people in regions not directly aligned with the Sun still perceive some light.