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KCET2010PhysicsRay Optics

A boat has green light of wavelength =500 ~nm on the mast. What wavelength would be measured and what colour would be observed for this light as seen by a diver submerged in water by the side of the boat? Given, n _ w = 4 3 .

Options

  1. AGreen of wavelength 376 ~nm
  2. BRed of wavelength 665 ~nm
  3. CGreen of wavelength 500 ~nm
  4. DBlue of wavelength 376 ~nm

Correct answer

D. Blue of wavelength 376 ~nm

Step-by-step solution

When light travels from rarer to denser medium its wavelength reduces. Wavelength in water = _ a _ w = 500 (4 / 3) =375 ~nm 376 ~nm (Blue colour)

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