| Standardization field | Electrical engineering
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| Technical committee | BAS/TC 30- Electric cables |
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| Term (EN) | refractive index (of a medium), index of refraction, (symb.: n) |
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| Definition (EN) | At a point in a medium and in a given direction, the ratio of the velocity of light in vacuum to the phase velocity of a sinusoidal plane wave propagating in that given direction. |
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| Term (FR) | |
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| Definition (FR) | |
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| Term (DE) | |
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| Definition (DE) | |
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| Term (BS) | |
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| Definition (BS) | |
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| Term (HR) | |
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| Definition (HR) | |
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| Term (SR) | prelomni indeks (medijuma), indeks prelamanja, (simbol: n) |
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| Definition (SR) | U tački medijuma i u datom pravcu odnos brzine svjetlosti u vakuumu i fazne brzine sinusoidalnog ravnog talasa koji se prostire u datom pravcu. |
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| Date | 2017-08-09 |
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| Standards | BAS IEC 60050-731:2017 |
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