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Critical Angle Experiment (Total Internal Reflection) - GCSE Required Practical

We will find the critical angle and refractive index of a perspex block by using a ray box and a protractor. When the angle of incidence is smaller than the critical angle, the ray is refracted. When the angle of incidence is larger than the critical angle, the ray goes through total internal reflection. When the angle of incidence is equal to the critical angle, the ray travels along the boundary of the prism. This is the angle of incidence that we want to note down. To find the refractive index, you need to do 1/sin(C). Music credit: Song: Dipcrusher - Islands (Vlog No Copyright Music) Music provided by Vlog No Copyright Music. Video Link:    • Dipcrusher - Islands (Vlog No Copyrig...  ​

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