Question

light of a single color passes thru water having a piece of glass suspended in it

Answer 1

Answer:

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

Explanation:

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Answer 2

Explanation:

Answer: (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