KVPY SX SB Exam 05-Nov-2017 Question Paper

It was found that the refractive index of material of a certain prism varied as $1.5+\frac{0.004}{{\mathit{\lambda }}^2}$ ,where $\mathit{\lambda }$ is the wavelength of light used to measure the refractive index. The same material was then used to construct a thin prism of apex angle 10°. Angles of minimum deviation $\left({\mathit{\delta }}_{\mathit{m}}\right)$ of the prism were recorded for the sources with wavelengths ${\mathit{\lambda }}_1\mathrm{and}{\mathit{\lambda }}_2$ respectively. Then [2017]