Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Optics Mirrors and Images
The focal length of a concave mirror is 80 cm. To obtain an inverted image two times the size of the object, the distance of the object from the pole of mirror will be:
1
90 cm
2
100 cm
3
120 cm
4
More than one of the above
5
None of the above