# Q2. A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole. Locate the image due to refraction in air. (1)  A real image at 8 cm                          (2) A virtual image at 8 cm (3) A real image at 4.8 cm                        (4)  A virtual image at 4.8 cm Q3.  In a medium of refractive index 1.6 and having a convex surface has a point object in it at a distance of 12 cm from the pole. The radius of curvature is 6 cm. Locate the image as seen from air. (1)  A real image at 30 cm                          (2) A virtual image at 30 cm (3) A real image at 4.28 cm                        (4)  A virtual image at 4.28 cm

Dear Student ,
Here in this case the refraction at a concave surface is given by ,

Hope this helps you .