speed of light
Scientific and everyday term for the constant speed of light in a vacuum, approximately 300,000 km/s.
The speed of light is about 300,000 kilometers per second.
You cannot exceed the speed of light.
In theory, no object can move at the speed of light.
According to current physics, it is impossible to exceed the speed of light.
The particle was traveling at a speed close to the speed of light.
光速 (also read こうそく) means 'speed of light', a completely different concept from 高速 'high speed', despite sharing the same pronunciation.
near light speed; sublight speed
speed of light
near-light speed; sub-light speed
faster-than-light speed; superluminal speed
Compound of 光 (light) and 速 (speed).