The relationship between the angle of rotation of a mirror and the angle of deflection of a reflected ray when the incident ray remain stationary is: If the mirror is turned through an angle θ; the reflected ray will turn through 2θ But the angle between the incident ray and the new reflected ray is 2(i+θ)
Hence the angle of deflection of the incident ray from its original path = 180 – 2(i+θ)
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![A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]")