Question

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During eye-testing an optician
of knom power, in contact, inside the testi
the power of the lens required by simple als
of two lenses of power +2.0 D and +0.25 D
The simple additive property of the powers
to minimise certain defects in images pro
consisting of several lenses, in contact
camera, microscopes and telescopes.
QUES
Define 1 dioptre of power of a lens.​

Answer 1

Answer:

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