Refraction occurs when light bends as it passes from one medium to another due to a change in its speed. No refraction occurs if the light ray is incident normally to the surface or if the media have the same refractive index.
A ray of light passes from medium X to another medium Y. If no refraction occurs then the angle between incident light and surface of medium Y should
Asked in Junior Accountant and TRA 2013 · Topic: Optics (Reflection and Refraction at plane and spherical surfaces)
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