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Refraction

A ray of ligh...

Question

A ray of light is moving from a rarer medium to a denser medium and strikes a plane mirror placed at $90^{o}$ to the direction of the ray as shown in the diagram.
(i) Copy the diagram and mark arrows to show the path of the ray of light after it is reflected from the mirror.
(ii) Name the principle you have used to mark the arrow to show the direction of the ray.

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Solution

(i) Diagram with the path of the ray after reflection is shown above.
(ii) Principle of reversibility of light is used to show the direction of the ray.

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