# A concave mirror is kept as shown in figure. Its principal axis coincides with the x-axis. A real object is moving towards the pole of the mirror starting from the −$\infty$ . In which region image will never form –A). Between -$\infty$ and CB). Between C and FC). Between F and PD). Between P and +$\infty$

Image will never be formed in the region between -$\infty$ and C and the region between P and +$\infty$. At $\infty$ the image will be formed at the focus, F and the image will be highly diminished. Beyond C the image will be formed between F and C and will be diminished. At C the image will be formed at C itself and will be of the same size. When the object is beyond C and F the position of the image will be beyond C and it will be enlarged. When the object is at F, the image will be formed at infinity and will be highly enlarged. When the object is between F and P, the image will be behind the mirror, it will be enlarged and the image will be erect and virtual.