Answer the question-both parts-thanks Share with your friends Share 0 Rohit Babu answered this Dear Student,Given,R=5 m, f=R2=2.5 m , u=-20 m1f=1u+1v⇒1v=1f-1u=12.5+120=8+120=920⇒v=209=2.22 mm=-vu=+2.2220=+0.11m is positive. So the image is virtual , erect and smaller than the object by a factor of .111b) Dentist uses a concave mirror. This is because a concave mirror producesan enlarged imagr that helps the dentist to examine the teeth easily.Regards... 0 View Full Answer Vyomm Vaidya answered this ?????????? 1