What If The Speed of Light is NOT CONSTANT?
PBS Space Time · Season 2023 · Episode 19
One of the most fundamental physics facts is that the speed of light in a vacuum is constant for all observers. But can we really be sure that the speed of light wasn’t different in the past, or perhaps in other parts of the universe? In fact, variable speed of light theories have long been used to try to explain everything from dark energy to gravity itself. Let’s explore how constant this fundamental constant really is.
Episode Details
Air date, runtime, timezone, and episode position.
Season
2023
Episode
19
Air Date
19/Jul/2023
Air Time
12:00
Runtime
21 min
Overview
Episode summary.
One of the most fundamental physics facts is that the speed of light in a vacuum is constant for all observers. But can we really be sure that the speed of light wasn’t different in the past, or perhaps in other parts of the universe? In fact, variable speed of light theories have long been used to try to explain everything from dark energy to gravity itself. Let’s explore how constant this fundamental constant really is.
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