An unpolarized component with intensity IO and a polarized component with intensity IP make up a horizontally moving beam of light.
In the air, a light beam is moving horizontally to the right. Every triangular prism has a larger index of refraction than air. A ray of light is a segment of light that is moving in a single direction along a straight path. A beam of light is a collection of light rays that emanates from a single source. Both convergent and divergent, they are parallel. A parallel Light Beam is created when the rays from a distant point source move in the same direction alongside one another.
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