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MHT CET 2021 (24 Sep, Shift 2) · Refraction, Glass Slab & Apparent Depth

Refraction, Glass Slab & Apparent Depth question from MHT CET 2021 (24 Sep, Shift 2)

Q55MHT CET 2021 · 24 SEP · SHIFT 2Easy

Refraction, Glass Slab & Apparent Depth

White light consists of wavelengths from 480 nm480\text{ nm} to 672 nm672\text{ nm}. What will be the wavelength range when white light is passed through glass of refractive index 1.6?

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Answer: (c)

  1. In a medium λ′=λμ\lambda' = \frac{\lambda}{\mu}.
  2. 4801.6=300 nm\frac{480}{1.6} = 300\text{ nm}, 6721.6=420 nm\frac{672}{1.6} = 420\text{ nm}
  3. So the answer is (c) 300 nm - 420 nm.
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