Light from a point source in air falls on a spherical glass surface (refractive index, μ=1.5 and radius of curvature =50 cm ). The image is formed at…

Light from a point source in air falls on a spherical glass surface (refractive index, $\displaystyle \mu=1.5$ and radius of curvature $\displaystyle =50 \mathrm{~cm}$ ). The image is formed at a distance of $\displaystyle 200$ cm from the glass surface inside the glass. The magnitude of distance of the light source from the glass surface is $\displaystyle \_\_\_\_$ m.