A) 5/3
B) 5/4
C) 16/5
D) 1.5
Correct Answer: A
Solution :
Suppose \[x\] is the number of waves contained in both. The wavelength of light in glass \[=4\text{/}x\] The wavelength of light in water \[=5\text{/}x\] We know that refractive index is inversely proportional to wavelength of light \[\mu \propto \frac{1}{\lambda }\] hence, \[{{\mu }_{g}}{{\lambda }_{g}}={{\mu }_{\omega }}{{\lambda }_{\omega }}\] \[{{\mu }_{g}}\frac{4}{x}=\frac{4}{3}\cdot \frac{5}{x}\,\,\,\,\Rightarrow \,\,\,{{\mu }_{g}}=\frac{5}{3}\]
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