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