209. 2023年5月11日 14:28:23 : CQfyOTgimg : YWNDUGNLcWZ4Yi4=[1]
Speed of Light is Various (クリ)
Plane waves of Sunlight are arriving horizontally from above to two passenger cars on Moon's surface. There is a small pinhole at the center of ceiling of two passenger cars, and on the floor, there is a spot of light that passed through pinhole.
The two passenger cars are moving on the Moon's surface at different speeds (in x direction). For an observer inside the passenger car, position of light spot on the floor will be different. This difference in position will be the same for an observer stands on the Moon's surface.
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