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the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence

the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence

the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence

the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence

the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence