Physics - Geometrical Optics Question with Solution | TestHub

Given, the wavelength of light$=600\text{n}\text{m}$

$=600\times {10}^{-9} \text{m}$

$n=1.5$

As the frequency of light cannot change,$c=\nu \lambda$

Speed of light in free space$=3\times {10}^8\mathrm{ }\mathrm{m} {\mathrm{s}}^{-1}$

$\therefore 3\times {10}^8=\nu \times 600\times {10}^{-9}$

$\Rightarrow \nu =\frac{3\times {10}^8}{600\times {10}^{-9}}$

$=5\times {10}^{14}\text{H}\text{z}$