Which of the following is true about the speed of light? It depends on the wavelength. In a vacuum, it is a constant value that does not depend on the observer. It is slowest in a vacuum unless an observer

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asked Feb 12, 2021 4.8k views

1 vote

Which of the following is true about the speed of light?

It depends on the wavelength.
In a vacuum, it is a constant value that does not depend on the observer.
It is slowest in a vacuum unless an observer is moving towards the source.
In a vacuum, it varies depending on the color of the light.