4 ms·
Shadows are cast at the speed of light and so is gravity.
by neuronic 8y ago
Shadows are cast at the speed of light and so is gravity.
- hymen0ptera 8y agoInterestingly enough, as a fun side effect of radial motion, the lateral motion of shadows can transit an object exceeding speeds faster than the speed of light constant, C. From Wikipedia: Light spots and shadows If a laser beam is swept across a distant object, the spot of laser light can easily be made to move across the object at a speed greater than c. https://en.wikipedia.org/wiki/Faster-than-light https://en.wikipedia.org/wiki/Faster-than-light Of course, the shadow must already be cast, in a continuous stream of uniquitous photons, which all need to be arriving upon the reflective surface at the speed of light, before the shadow can transit the surface within the area of effect.