Input interpretation
total internal reflection
Equation
c_1 = c/n_1 | θ_c = sin^(-1)(n_2/n_1) | θ_c | critical angle n_1 | refractive index within material n_2 | refractive index outside material c_1 | speed of light within material c | speed of light (≈ 2.998×10^8 m/s)
Input values
refractive index within material | 1.3 refractive index outside material | 1
Result
critical angle | 50.28° (degrees) = 877.6 mrad (milliradians) = 0.8776 radians = 50 degrees 17 arc minutes 5.506 arc seconds speed of light within material | 230610 km/s (kilometers per second) = 5.159×10^8 mph (miles per hour) = 2.306×10^8 m/s (meters per second) = 0.7692 c (speed of light) speed of light outside material | 299792 km/s (kilometers per second) = 6.706×10^8 mph (miles per hour) = 2.998×10^8 m/s (meters per second) = 1 c (speed of light)