Q120 / 160 · JIPMER 2006 · Physics

A light passing through air has wavelength $6000 Å$. The wavelength when same ray passes through a glass slab of refractive index 1.5 will be :

  • A
    $2000 Å$
  • Correct answer
    B
    $4000 Å$
  • C
    $8000 Å$
  • D
    $1200 Å$

Solution

When light ray passes through a glass slab, then new wavelength $\begin{aligned} \lambda^{\prime} & =\frac{\lambda}{\mu}=\frac{6000}{1.5} \\ & =4000 Å\end{aligned}$

Hence, the correct answer is option: 'B'.

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