Answered: Myopia a) A person with myopia has a…

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter26: Image Formation By Mirrors And Lenses

Section: Chapter Questions

Problem 46P

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Myopia a) A person with myopia has a far point of 0.2 m. What power contact lens would they need to correct for this, so that they can see objects at infinity? b) A person with myopia has a far point of 5.0 m and the focal length of the contact lens required to correct for this is calculated to be f = -5.0m. If the focal length that the optician actually supplied were f = -4.5m, do you think that the person would still find these useful? 6. A woman can see clearly only when objects are between 50 cm and 250 cm from her eye. The optometrist suggests that she use bifocal glasses in which the upper part of the glasses will allow her to see distant objects clearly and the lower part of the glasses will allow her to read a book placed 25 cm away. (Assume distance between glasses and the eye is negligible) a) What power lenses would be required in each half of the glasses? b) What would her near point be if she used only single focal length glasses that enabled her to see distant objects?

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