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?

Question

anonymous · Answer

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..

anonymous · Answer

frequency=velocity in medium/lamda(wavelength)
follow quarkine's expalnation...apt