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प्रश्न
What is a principle of reversibility?
उत्तर
The principle of reversibility states that light will follow exactly the same path if its direction of travel is reversed.
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संबंधित प्रश्न
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Figures (a) and (b) show the refraction of a ray in air incident at 60° with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in the glass when the angle of incidence in water is 45° with the normal to a water-glass interface [Figure (c)].
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| (a) | (b) | (c) |
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Obtain the equation for critical angle.
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