If the Large Hadron Collider is 27 km long, and visible light travels 3.0 × 108 m/s, how long does it take a ray of visible ligh
t to travel from one end of the collider to the other?
2 answers:
27 km = 27000m. Time = distance/speed = 27000/3x10^8 = 9x10^-5 s.
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