History, 25.10.2020 03:30 Epicgible8136

Which of the following is true about the speed of light? A) It depends on the wavelength
B) In a vacuum, it is a constant value that does not depend on the observer.
C) It is slowest in a vacuum unless an observer is moving towards the source.
D) In a vacuum, it varies depending on the color of the light.

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