What is the power of lens? What are the two uses of a concave mirror?
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The reciprocal of focal length is called power of lense.
Unit=Diopter
Use of concave mirror-
1.Shaving Mirror
2.Doctor's head mirror
3.Dentist's mirror
4.Reflector of a torches
Unit=Diopter
Use of concave mirror-
1.Shaving Mirror
2.Doctor's head mirror
3.Dentist's mirror
4.Reflector of a torches
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