Multiple choice general knowledge science & technology

What is the refractive index of air approximately

  1. 1.33

  2. 1.003

  3. 1.6

  4. 2.33
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Air has a refractive index very close to 1, typically 1.0003 at standard temperature and pressure. This means light travels only slightly slower in air than in a vacuum. The value 1.33 is for water, 1.6 for some glass, and 2.33 for some diamond-like materials.

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