Question

you are given kerosene turpentine and water in which of these does the light travel fastest ​

Answer 1

Answer:

Since water has lowest refractive index, so light travels fastest in this optically rarer medium than kerosene and turpentine oil.

Answer 2

Answer:

Clearly, water having lower refractive index 1.33, is optically rarer than kerosene and turpentine. Therefore, the light travels fastest in water because of its lower optical density.

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