Reply to post: Re: Creates more problems than it solves?

Three certainties in life: Death, taxes and the speed of light – wait no, maybe not that last one

katrinab Silver badge

Re: Creates more problems than it solves?

"I thought the speed of light was a constant by definition. If you allow the speed of light to vary, then another measurement would need to be defined as constant."

The meter would need to be defined as a constant. The second is defined separately, the speed of light is defined as a fixed number of meters per secon, and the length of the meter is derived from that.

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