A long-sighted person's near point has receded to : nothing closer than this can be…
PHYSICS · Subjective · Fermi University Physics · Optics & Photonics · Geometrical optics and imaging · Geometrical optics and imaging
Optics and Photonics, Ch Stops, pupils and optical instruments
Problem
A long-sighted person's near point has receded to 1.50m: nothing closer than this can be brought into focus by the unaided eye. Using the thin lens equation so1+si1=f1, find the power, in dioptres, of the thin spectacle lens (worn close to the eye) that lets this person read a book held at the standard near point of d0=25.0cm.