If a ray of light passes from a denser medium to a rarer medium in a straight line, the angle of incidence must be
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45degree
Because in a straight line the ray of light is perpendicular to the medium and make angle of 90.And we know that any ray projected at 90 degree angle is not difrected and goes straight in all medians so angle of incident and refraction is 45 which in combination makes 90
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Because in a straight line the ray of light is perpendicular to the medium and make angle of 90.And we know that any ray projected at 90 degree angle is not difrected and goes straight in all medians so angle of incident and refraction is 45 which in combination makes 90
Mark me as brainliest
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