UPSC IMPORTANT QUESTIONS
Arrange the following in decreasing order of refractive indexes.
1. Water
2. Air
3. Ice
Select the correct answer using the codes given below.
a) 3 >1 > 2
b) 1 > 3 >2
c) 3 > 2 > 1
d) 1 > 2 > 3
Answer - b
Explanation
– Water refractive index is 1.33, of ice is 1.31 and air is 1.
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