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Q. |
A thin oil film on a water surface appears coloured because of – |
A. | reflection |
B. | interference |
C. | diffraction |
D. | polarization |
Answer» B. interference | |
Explanation: A thin oil film on a water surface appears coloured because of thin-film interference which involves the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface. |
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