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Question
Why is the ratio of the velocities of light of wavelengths 4000Å and 8000Å in vacuum 1: 1?
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Solution
In vacuum light or any electromagnetic wave velocity is always constant 3 × 108 m/s and it does not depend on wavelength or frequency.
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| II | 40° | 28° | 40° |
| III | 50° | 36° | 50° |
| IV | 60° | 40° | 59° |
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