Q.

The speed of light of all colors is same in a [[1]].


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Detailed Solution

The speed of light of all colours is the same in a vacuum.
The speed of light of all colours is the same in a vacuum as there is no medium in a vacuum. In a vacuum, the speed of light of all colours is 3 ×108 m/s. We know that speed of light changes when the medium changes. In an optically denser medium, the speed of light is lesser, and in an optically rarer medium, the speed of light is more, although it can never be more than the speed of light in a vacuum.
 
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