Snell's Law (Simplified)

📊 intermediate

$$n = \frac{\sin i}{\sin r}$$

The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media.

Variables & Units

$n$

Refractive index

Unit: Dimensionless

$i$

Angle of incidence

Unit: Degrees

$r$

Angle of refraction

Unit: Degrees

Key Information

📐 Derived From

Law of refraction.

💡 Example

Calculating the bending of light in a glass slab.

🔧 Applications

Lens design.

⚠️ Constraints

Valid for a specific pair of media.

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