Suppose you are given three mediums, A, B, and C, with refractive indexes 1.47, 1.33, and 1.44 respectively. If the velocity of light in A, B, and C are VA, VB, and VC, respectively, then which of the following is true?

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RRB Group D 26 Sept 2022 Shift 2 Official Paper
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  1. VB > Vc > VA
  2. Vc > VB > VA
  3. VA > VC > VB
  4. VA > VB > Vc

Answer (Detailed Solution Below)

Option 1 : VB > Vc > VA
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Detailed Solution

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The correct answer is 'VB > Vc > VA'

Key Points

  •  The velocity of light through a medium is indirectly proportional to the refractive index of the medium.
  • Now velocity \(\mathrm{V}_{\mathrm{A}}:\mathrm{V}_{\mathrm{B}}:\mathrm{V}_{\mathrm{B}}=\frac{1}{1.47}:\frac{1}{1.33}:\frac{1}{1.44}\\=0.68:0.75:0.69\\=68:75:69\)
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