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Light of a single colour is passed throu...

Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen.
(i) When is the glass piece not seen ?
(ii) why is the light of a single colour used ?

Text Solution

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(i) The glass piece is not seen when the refractive index of liquid becomes equal to the refractive index of glass.
(ii) Light of a single colour is used because the refractive index of a medium (glass or liquid) is different for the light of different colours.
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ICSE-REFRACTION OF LIGHT AT PLANE SURFACES-EXERCISE-4(A)
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  8. How does the refractive index of a medium depend on its temperature ?

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