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प्रश्न
A glass medium has a refractive index of \[n = 1.5\]. The speed of light in this glass is:
पर्याय
\[2 \times 10^8 \ \text{m/s}\]
\[1.5 \times 10^8 \ \text{m/s}\]
\[4.5 \times 10^8 \ \text{m/s}\]
\[3 \times 10^8 \ \text{m/s}\]
MCQ
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उत्तर
Using \[v = \frac{c}{n} = \frac{3 \times 10^8}{1.5} = 2 \times 10^8 \ \text{m/s}\]. Light travels slower in glass than in vacuum because the refractive index is greater than 1.
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