Question

The focal length of a small concave mirror is 2.5 cm. In order to use this concave mirror as a dentist's mirror, the distance of tooth from the mirror should be :; A. 1.5 cm; B. 2.5 cm; C. 4.5 cm; D. 3.5 cm

Answer 1

Answer:

2.5

how many distance from the mirror the object is placed the same dist should be there

Answer 2

Answer:

(B) 2.5 cm

Explanation:

As per the question,

We have been provided that,

The focal length of a concave mirror is = 2.5 cm.

As we know that when the object is placed between the focus and the pole of the concave mirror,the magnified image is formed.

So, the distance of the tooth from the mirror should be 2.5 cm, so that dentist can see the enlarge view of tooth.

Hence, in order to use the concave mirror given here as a dentist's mirror.

We can say that the distance between tooth and mirror must be equal to = 2.5 cm.