| 11. | Energy = mass time the velocity of light squared.
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| 12. | What must energy and mass be doing that connects them by the velocity of light squared?
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| 13. | In an anisotropic mineral, the velocity of light differs as the direction of the crystal changes.
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| 14. | Zorite is anisotropic, which means that the velocity of light is not the same in all directions.
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| 15. | The effective velocity of light in various transparent substances containing ordinary matter, is less than in vacuum.
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| 16. | Usually, such reports deal with a phase velocity or group velocity faster than the vacuum velocity of light.
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| 17. | Where h is the Planck constant, ? the optical frequency, ? the size of the velocity of light.
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| 18. | The phase velocity of light is not generally equal to c ( the vacuum speed of light ).
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| 19. | Which means that the velocity of light changes in crystallographic direction, this is easily identifiable in thin section.
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| 20. | The refractive index is the ratio of the velocity of light in a vacuum to that in the mineral.
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