Question

The angle between the incident ray and the normal is 30°. What will be the value of ˂i + ˂ r * a) 30° b) 60° c) 90° d) 150°​

Answer 1

Answer:

According to first law of reflection incident and reflected angles are equal. So, reflected angle will be 30 degrees. Reflected angle and angle B together make up the angle between normal and the surface that is 90 degrees. So, Angle b = (90 - reflected angle), which is (90-30) = 60 degree.

Explanation:

Answer 2

Answer:

According to first law of reflection incident and reflected angles are equal. So, reflected angle will be 30 degrees. Reflected angle and angle B together make up the angle between normal and the surface that is 90 degrees. So, Angle b = (90 - reflected angle), which is (90-30) = 60 degree.

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