speed of light

Definition

The speed of electromagnetic radiation, which in a perfect vacuum is equivalent to 299,792,458 metres per second.

Example Sentences

• "Early physicists developed insightful methods for measuring the speed of light."
• "As the subjective speed of light is raised within the field, objects outside will appear to red-shift, eventually becoming visible only to radio telescope antennae."
• "The science world was left in shock when workers at the world's largest physics lab announced they had recorded subatomic particles travelling faster than the speed of light – a feat that Einstein said was impossible."

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