The near point of a person is 50cm and the far point is 1.5 m. The spectacles required for reading purpose and for seeing distant objects are respectively
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The near point of a person is 50cm and the far point is 1.5 m. The spectacles required for reading purpose and for seeing distant objects are respectively The near point of a person is 50cm and the far point is 1.5 m. The spectacles required for reading purpose and for seeing distant objects are [...]