b) 1.5cm is the right answer.
The object must be placed between the pole and focus, so the correct anser is c.
The focal length of a small concave mirror is 2.5cm. In order to use this concave mirror as a dentist’s mirror, the distance of tooth from the mirror should be:
a) 2.5cm
b) 1.5cm
c) 4.5cm
d) 3.5cm
a) 2.5cm
b) 1.5cm
c) 4.5cm
d) 3.5cm
The focal length of a small concave mirror is 2.5cm. In order to use this concave mirror as a dentist’s mirror, the distance of tooth from the mirror should be:
a) 2.5cm
b) 1.5cm
c) 4.5cm
d) 3.5cm
a) 2.5cm
b) 1.5cm
c) 4.5cm
d) 3.5cm