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Standard X
Physics
Rules of Ray Diagram for Representation of Images Formed
Both refracti...
Question
Both refraction and reflection follow Fermat's principle.
A
False
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B
True
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The correct option is
B
True
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Q.
Both refraction and reflection follow Fermat's Law.
Q.
Assertion :The principle of reversibility can be extended to systems that consists of media having a continuously variable refractive index. Reason: Principle of reversibility is applicable for both refraction and reflection.
Q.
How does Fermats principle of least time prove that light always retraces its path?
Q.
Assertion :The principle of reversibility presupposes that the attenuation of a light ray during its passage through an optical medium because of reflection, refraction, and absorption is not affected by a reversal of the direction of the ray. Reason: Principle of reversibility can only be applied to lens system.
Q.
You have learnt in the text how Huygens’ principle leads to the lawsof reflection and refraction. Use the same principle to deduce directlythat a point object placed in front of a plane mirror produces avirtual image whose distance from the mirror is equal to the objectdistance from the mirror.
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