A person is nearsighted with a far point of 75.0 cm. (a) What focal length contact lens is needed to give him normal vision? (b) What is the power of the corrective lens

Two lenses are placed along an optical rail. One is a converging lens, with a focal length of f1 = 30.3 cm. The second lens, a diverging lens with a focal length of f2 = −20.0 cm, is placed d = 110 cm to the right of the converging lens. An object ho = 2.02 cm high is placed p1 = 40.5 cm to the left of the converging lens. (a) Determine the position of the final image. (Enter the position in cm relative to the diverging lens.) magnitude  ? cm direction  right or left?   of the diverging lens   (b) Determine the magnification of the final image. (Indicate the orientation with the sign of your answer.)  Hint* The total magnification is the product of each individual magnification. (c) Is the image upright or inverted?    (d) Repeat parts (a) through (c) for the case in which the second lens is a converging lens having a focal length of 20.0 cm. (Enter the position in cm relative to the second lens. Indicate the orientation of the magnification with the sign of your…

An achromatic lens is made of two very thin lenses,placed in contact, that have focal lengths F1=-27.8 cm and f2=+25.3 cm (a) Is the combination converging ordiverging? (b) What is the net focal length?

An optometrist needs to prescribe corrective lenses for a person whose near point is q = 58.8 cm. If the patient is to see objects clearly at a distance of p = 25.0 cm, calculate the following. (Neglect the distance from the lens to the eye.) (a) focal length (in cm) of the appropriate corrective lens cm (b) power (in diopters) of the appropriate corrective lens diopters