What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?
If the pondered ray is at an attitude of 90° to the incident ray, then the perspective of prevalence is 45 °. According to the regulation of mirrored image, the attitude of prevalence is identical to the perspective of mirrored image. Therefore, the attitude of occurrence and the attitude of mirrored image each are = 90/2 45°.
