Fig. 36-11 (a) An uncorrected myopic (nearsighted) eye. (b) A negative (diverging) lens spreads the rays so that the myopic eye can focus the image on.

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Fig (a) An uncorrected myopic (nearsighted) eye. (b) A negative (diverging) lens spreads the rays so that the myopic eye can focus the image on the retina. The virtual image formed by the diverging lens acts as an object at the near point. © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig The magnifier: (a) The subtended angle  (angular size) is largest when the object is at the near point. (b) The magnifier gives a virtual image at infinity. The virtual image appears to the eye to be a real object subtending a larger angle  ’ at the eye. © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig (a) Elements of a microscope. (b) Object is very close to the objective lens. © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig Astronomical refracting telescope. Distant object has a real inverted image.

© 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics Fig Inversion of an image in prism binoculars.

© 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics Fig Optical systems for reflecting telescopes. (a) prime focus; (b) Newtonian; (c) Cassegrain.