Refractive index of a material for infrared light is _________.

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Equal to that for red color of light

Equal to that for ultraviolet light

Less than that for ultraviolet light

Greater than that for ultraviolet light

answer is C.

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Detailed Solution

The ratio of the speed of light in a vacuum to that in a second medium with a higher density is used to compute the refractive index (also known as the index of refraction).
In mathematical formulae and descriptive writing, the letter n or n' is most frequently used to represent the refractive index variable.
For infrared light, a material's refractive index is lower than for UV light.
$μ \infty \frac{1}{λ}$

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