Question

please tell me this answer step by step answer ​

Answer 1

Answer:

90°

Explanation:

The correct answer is 90°. According to the first law of reflection of light, if the angle of incidence is 45 degrees then the angle between the reflected ray and the incident ray will be 90 degrees. ⇒ i + r = 45 + 45 = 90°.

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Answer 2

Answer:

The correct answer is 90°. Here's the formula

i+r =45+45=90