COMEDK · Physics · 25. Ray Optics
\(0.04 \mathrm{~m}\) of glass contains the same number of waves as \(0.05 \mathrm{~m}\) of water, when monochromatic light passes through them normally. Refractive index of water is \(4 / 3\). Refractive index of glass is
- A \(5 / 3\)
- B \(5 / 4\)
- C \(5 / 2\)
- D \(4 / 5\)
Answer & Solution
Correct Answer
(A) \(5 / 3\)
Step-by-step Solution
Detailed explanation
If \(n\) be the number of waves, then wavelength of light in glass, \(\lambda_{g}=\frac{0.04}{n}\) and wavelength of light in water, \(\lambda_{w}=\frac{0.05}{n}\) Speed of light in glass, \(v_{g}=\lambda_{g} \times f=\frac{0.04 f}{n}\) where, \(f=\) frequency of light.…
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