Question

Vesvikaran par tipi likho
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Answer 1

Answer:

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. ... Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.

Answer 2

Explanation:

Basis of Classification. Species is the basic unit of classification. Organisms that share many features in common and can breed with each other and produce fertile offspring are members of the same species. Related species are grouped into a genus (plural- genera).