The angle between the horizontal plane and the incident ray of light is 40 °. What are the angles of incidence and reflection?

The angle between the plane and the incident beam is 40, which means between the perpendicular and the beam, 90-40 = 50. The angle of incidence is 50. According to the laws of optics, the angle of incidence is equal to the angle of reflection and is also equal to 50

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