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Water has a refractive index 1.33 and alcohol has refractive index 1.36. Which of the two medium is optically denser ?

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Water has a refractive index 1.33 and alcohol has refractive index 1.36. Which of the two medium is optically denser ? Give reason for your answer. Draw a ray diagram to show the path of a ray of light passing obliquely from water to alcohol.

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Refractive index of alcohol > refractive index of water.

So, alcohol is optically denser than water.

When a ray of light enters from water to alcohol, it bends towards the normal :

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