Solve this:
Q.30. A red colour in air has wavelength 760 nm when light passes through water of refractive index n = 4 3 , wavelength becomes 570 nm. (wavelength of yellow colour in air is 570 nm). Then colour of red light in water is
(1) Red
(2) Green
(3) Yellow
(4) Blue

Dear Student ,

it will appear with the same colour .
So option(1) is correct here


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