Calculation of Critical Angle
The critical angle (C) can be calculated using the formula:
Sin C = 1/n
or
C = sin-1(1/n)
where,
- C is critical angle
- 1 is refractive index of air or vacuum
- n is refractive index of medium
How to Find Critical Angle of a Light Ray
The critical angle is a key concept in optics, especially when light interacts with boundaries between two dissimilar materials. It determines the exact angle of incidence at which light will refract along the interface between the materials, instead of entering the second medium.
In this article, how to find the critical angle of a light ray, the formula for critical angle, Snell’s law, finding a critical angle, and solve the problem.