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11-10-2021
Physics

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What happens if the incident beam is perpendicular to the surface (at an angle of 90 degrees)?

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11-10-2021

If the ray is perpendicular to the surface, then the incident ray, the reflected ray and the transmitted (refracted) ray all lie along the same line (i.e they are collinear). If the ray is not perpendicular to the surface, then the ray appears to be bent at the surface.

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