ICSE Class 10 Physics 2013 Solved Paper
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A ray of light is moving from a rarer medium to a denser medium and strikes a plane mirror placed at 90 ∘ to the direction of the ray as shown in the diagram.
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Question : 15
Total: 70
Name the principle you have used to mark the arrow to show the direction of the ray.
Solution:
Principle of reversibility of light.
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