Refractive Index (Speed of Light)

📊 beginner

$$n = \frac{c}{v}$$

Ratio of the speed of light in vacuum to the speed of light in a specific medium.

Variables & Units

$n$

Refractive Index

Unit: Dimensionless

$c$

Speed of light in vacuum

Unit: $3 \times 10^8 m/s$

$v$

Speed of light in medium

Unit: $m/s$

Key Information

📐 Derived From

Wave theory of light.

💡 Example

Refractive index of water is $1.33$.

🔧 Applications

Optical fiber communication and gemology.

⚠️ Constraints

$n$ is always $\geq 1$.

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