What is meant by power of lens ? What is its s.I unit ? Name the type of lens whose power is positive, a lens has power -2.5d. Which type of lens it is?
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the reciprocal of focal length is known as power of lens.
It's I.S unit is Dioptre.
it has a hypermetropia because it's focal length is 40cm
It's I.S unit is Dioptre.
it has a hypermetropia because it's focal length is 40cm
suyash411:
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