The value of n is always greater than or equal to 1 because the speed of light in any medium is always less than or equal to its speed in vacuum. Calculating Index of Refraction Using Snell’s Law: One ...

Step 4: Calculate the Speed of Light in a Medium. To calculate the speed of light (v) in any medium with known refractive index (n), use this formula: v = c / n. where ‘c’ is the speed of light in ...

For Higher Physics, revise how to calculate the expected direction of refracted rays using Snell’s law. Calculate critical angle given refractive index.

Calculate critical angle given refractive index. For Higher Physics, revise how to calculate the expected direction of refracted rays using Snell’s law. BBC Homepage ...