Snell's Law Calculator
Calculate the angle of refraction using Snell's law: n1*sin(theta1) = n2*sin(theta2).
Angle of Refraction
19.47 °
Angle of Refraction vs Refractive Index 1
Formula
## Snell's Law Snell's law describes how light bends when passing between media with different refractive indices. ### Formula **n1 * sin(theta1) = n2 * sin(theta2)** Light bends toward the normal when entering a denser medium (higher n) and away from the normal when entering a less dense medium.
Exemplo Resolvido
Light enters glass (n=1.5) from air (n=1) at 30 degrees.
- 01n1*sin(theta1) = n2*sin(theta2)
- 021*sin(30°) = 1.5*sin(theta2)
- 030.5 = 1.5*sin(theta2)
- 04sin(theta2) = 0.333
- 05theta2 = 19.47°
Perguntas Frequentes
What is the refractive index?
The ratio of the speed of light in vacuum to the speed of light in the material. Air: ~1.0003, water: 1.33, glass: 1.5, diamond: 2.42.
What causes a rainbow?
Sunlight refracts when entering water droplets, disperses by wavelength (Snell's law gives different angles for different colors), and refracts again on exit.
What happens when light goes from dense to less dense?
The refracted angle is larger than the incident angle. Above a critical angle, total internal reflection occurs.
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