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Light of wavelength 0.522 µm (in air) enters the water in a swimming pool. The speed of light in water is 0.740 times the speed in air. What is the wavelength of the light in water?
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ratio of initial and final wavelenghts(here initial refers to that in medium1 i.e air air and final in water) os same a ratio of initial and final speeds;frequency being constant..
frequency=velocity in medium/lamda(wavelength) follow quarkine's expalnation...apt
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