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SlideshowReport

The Speed of Light Is Constant

Description
The Speed of Light Is Constant
(b) As seen from the car, moving toward the lamp at v = 0.5c, the photons are also traveling at the speed v = c. The difference in color between the
light in the two figures is due to the Doppler shift, as explained
in An Astronomer’s Toolbox 4-3.
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