Define a ray of light and a beam of light. What are the different types of beams of light?
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Define a ray of light and a beam of light. What are the different types of beams of light?

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Ray of Light : The direction or path along which light energy travels in a medium is called a ray of light. It is represented by a straight line with an arrow marked on it.

Beam of Light : A group of light rays is called a beam of light.

Types of beams of light : A beam of light may be parallel, convergent or divergent, as shown in fig.

The rays from a distant light source (such as the sun) are parallel to each other, they constitute a parallel beam.

  • In a convergent beam, the rays proceed towards a point.
  • In a divergent beam, the rays proceed away from a point.

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