Speed of Light Is Finite: Who Figured It Out And How?

Speed of Light Is Finite: Who Figured It Out And How? Everybody knows the speed of light is finite, but do you know who figured it out first and how was it done? Scratching your head on this one? David Butler clears away the question in this excerpt from the Solar System episode of his series How Far Away Is It. It turns out the answer involves Galilei, Jupiter's moon Io, and a particularly inspired Danish astronomer.

• #فناوری_و_رایانه
• #light
• #speed_of_light
• #light_speed
• #jupiter
• #moon