CBSE Class 10 Science 2020 · Paper 31/4/1 · Question 21

(a) Position: the image is formed behind the mirror, $30$ cm from the pole ($v=+30$ cm). (b) Size: the image is magnified, three times the size of the object ($m=+3$). (c) Nature: the image is virtual and erect. Ray diagram: a ray from the top of the object parallel to the principal axis is reflected through F, and a ray along the line from C is reflected back along itself. The reflected rays diverge, and their backward extensions meet behind the mirror, giving a virtual, erect and enlarged image, as in the figure.