Which are the two types of refractive index?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
As mentioned above, the two fundamental classifications are absolute refractive index (relative to vacuum) and relative refractive index (comparing two media). Additionally, you might encounter distinctions based on measurement wavelength, such as refractive index at the sodium D-line (589 nm) versus other wavelengths, though these are variations rather than distinct "types."
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