Q.8.A dentist uses a concave mirror (focal length 4.5 cm) to examine some teeth.
ID: 2096862 • Letter: Q
Question
Q.8.A dentist uses a concave mirror (focal length 4.5 cm) to examine some teeth. If the distance from the object to the mirror is 0.58 cm, what is the magni?cation of the tooth?
Q.9.A 2.17 cm high object is placed 4.61 cm in front of a concave mirror. If the image is 4.47 cm high and virtual,what is the focal length of the mirror? Answer in units of cm.
Q.10.A concave makeup mirror is designed sothat a person 30 cm in front of it sees an upright image magni?ed by a factor of 2.What is the radius of curvature of the mirror?Answer in units of m.
Explanation / Answer
we have v=fu/f+u
thus magnifinification= v/u
f/f+u
=1.148
9)
m=
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