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how to calculate speed of light from critical angle. To calculate the refractive index start by measuring the width of the transparent object. For the boundary between the glass and crown water the critical angle is 610 degrees.
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For the water-to-air limit the critical angle is 486 degrees. The ratio of n r n i is a value less than 10. Refraction is the bending of the path of a light wave as it passes from one material to another material.
For critical angle we will use snells lawC is critical angle and C 45onmedium sinC nair sin90 nair 1sinC S inC 1 sin451 nmedium 141we know that refractive index n speedof lightinmediumspeedof lightinvacuum where c 3108ms1414 vc v 14143108 v 212108ms.
The critical angle will be 486 degrees for water-air boundaries and 610 degrees for crown glass-water boundary. First determine the speed of light in a vacuum. Finally calculate the index of refraction. If the ray of light passes from glass to air calculate the value of critical angle.
