Intext Questions XI — task. Science CBSE, Class 10.

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The refractive index of diamond is \(2.42\). What is the meaning of this statement?

Let us consider,

\(\mu\) - Absolute refractive index

\(c\) - Speed of light in vacuum

\(v_m\) - Speed of light in medium

Then,

\(\mu\ =\ \frac{c}{v_m}\)
\(\mu\ =\ \frac{v_m}{c}\)
\(\mu\ =\ {c} \times {v_m}\)

If the refractive index of diamond is \(2.42\), then the speed of light in diamond is,

\({2.42}\) times the speed of light in vacuum
\(\frac{1}{2.42}\) times the speed of light in vacuum
same as the speed of light in vacuum

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