When an object is placed between the pole point and focal point of a concave mirror, the nature of the image and the Cartesian sign conventions used are _______.
1
+u, +v and +f. The nature of the image is virtual and diminished
2
-u, -v and -f. The nature of the image is real and inverted
3
-u, -v and +f. The nature of the image is real and enlarged
4
-u, +v and -f. The nature of the image is virtual and erect