If angle of incidence increases angle of deviation decreases but after a certain value of angle of
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the angle of incidence increases, the angle of deviation decreases it reaches a minimum value but after that,on further increasing the angle of incidence the angle of deviation begins to increase.
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Answer:
when the incidence ray is perpendicular to the glass slab it will show no deviation
Step-by-step explanation:
when the incidence ray is at an angle of 0⁰ it shows no deviation
hope this might help you
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