Question

what is the angle of incidence of a Ray if the reflected ray is at an angle of 90 degree to the incident ray​

Answer 1

Answer:

Both Reflected and Incident angle are 45° here

Step-by-step explanation:

So we all know about 1st law of reflection i.e "Angle of incidence=Angle of Reflection"

So let the two angles be 'x'

2x=90

x=45°

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Answer 2

Answer:

angle of incidence = angle of reflection

therefore angle of incidence is 90 degree