Snell's Law
Calculate refraction angle or refractive index with Snell's law. Useful for optics problems with step-by-step formula substitution.
Key formula
n1 sin(theta1) = n2 sin(theta2)
About this tool
Calculate refraction angle or refractive index with Snell's law. Useful for optics problems with step-by-step formula substitution.
How to use this calculator
- Choose the variable you want to solve for and confirm which values are already known.
- Enter inputs in consistent units before calculating so the formula is applied correctly.
- Check whether the result is physically reasonable by comparing it with the size of the inputs.
- Use the step-by-step breakdown to see how the equation was rearranged and evaluated.