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Conceptual Questions, Physical Optics

See here solved conceptual questions of Physical Optics included in the course of First Year Physics.

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Question 1A soap bubble looks black when it bursts, why?
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Question 2What is the difference between interference and diffraction>
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Question 3In Michelson interferometer a second glass plate is also used, why?
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Question 4How you can explain Brewster’s law of polarization?
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Question 5What is meant by path difference with reference to the interference of two wave motions?
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Question 6Why it is not possible to observe interference when the light beams from the head lamps of a car overlap?
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Question 7A telephone pole casts a clear shadow in the light of a distant head lamp of a car, but no such effect is noticed from the sound of the car horn, why?
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Question 8Why it is not possible to obtain the diffraction of X-rays by Young’s double slit experiment?
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Question 9Can we apply Huygens’s principle to RADAR waves?
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Question 10How would you justify that light waves are transverse?
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