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  • Physics: Optics, Waves, and Acoustics
  • A completely transparent material will be invisible in va...
Multiple choice

A completely transparent material will be invisible in vacuum when the refractive index is

  1. unity

  2. more than unity

  3. less than unity

  4. equal to 1.33

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A completely transparent material will be invisible in vacuum when the refractive index is unity. The refractive index of vacuum is 1. 

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