A person with presbyopia has a near point of 65 cm. This person wears glasses to...
A person with presbyopia has a near point of 65 cm. This person wears glasses to correct their vision such that they can comfortably read the screen of their mobile phone when it is held 25 cm from their eyes.
If this person wears their glasses such that they sit 1.4 cm from their eye, what is the optical power of the corrective lenses in their glasses? (to 2 s.f and in D)
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A person with presbyopia has a near point of 65 cm. This person
wears glasses to...
(1.) Nearsightedness (a.) A nearsighted person has a far point that is 323 cm from her...
(1.) Nearsightedness (a.) A nearsighted person has a far point that is 323 cm from her eye. Her lens in a pair of glasses is 2 cm in front of her eye. What focal length is required to cast the image of a far-away object at her far point? (b.) If these glasses are used to view an object 525 cm from her eye, where do her glasses cast the image? In both cases, quote your distance as measured from...
an older person needs a pair of reading glasses.Her near point is at 48 cm from...
an older person needs a pair of reading glasses.Her near point is at 48 cm from her eyes and reading glasses are 2 cm from her eyes. The glasses should allow her to read 25 cm away. What are the object and image distances? what is the magnification of these lenses? What is the focal length of the pair of glasses? What is the optical power of the lens pair? What type of lenses (converging, diverging) does she need?
A near sighted person wears corrective glasses made of a diverging lens with a focal length...
A near sighted person wears corrective glasses made of a diverging lens with a focal length of f = −50 cm. The result is that far away objects appear much closer, and the person sees this image rather than the actual object. Suppose a 12 cm long pencil is held vertically at a distance of 2.0 m from the person. Determine the height and location of the formed image. (for trig-based physics class)
Reading glasses of what power are needed for a person whose near point is 120 cm,...
Reading glasses of what power are needed for a person whose near point is 120 cm, so that she can read a computer screen at 55 cm?Assume a lens-eye distance of 2.0 cm.
An optometrist tests a person and finds that without glasses, he needs to have his eyes...
An optometrist tests a person and finds that without glasses, he needs to have his eyes 15.0 cm from a book to read comfortably and can focus clearly only on distant objects up to 2.75 m away, but no farther. A typical normal eye should be able to focus on objects that are between 25.0 cm (the near point) and infinity (the far point) from the eye. (a) What type of correcting lenses does the person need: single focal length...
A person has a near point of 14 cm and a far point of 82 cm....
A person has a near point of 14 cm and a far point of 82 cm. Is the person nearsighted or farsighted? What focal length corrective lens will allow this person to read the whiteboard from the back of a large classroom? Are the corrective lenses converging or diverging? What is the power of the corrective lenses?
Reading glasses of what power are needed for a person whose near point is 115 cm...
Reading glasses of what power are needed for a person whose near point is 115 cm , so that he can read a computer screen at 58 cm ? Assume a lens-eye distance of 2.0 cm . Express your answer using two significant figures.
Reading glasses of what power are needed for a person whose near point is 50.0 cm,...
Reading glasses of what power are needed for a person whose near point is 50.0 cm, so that she can read clearly the print of a book located at 25.0 cm? Assume a lens-eye distance of 2.00 cm.
8. A farsighted person has a near point located 210 cm away from the eyes. Determine...
8. A farsighted person has a near point located 210 cm away from the eyes. Determine the focal length of the converging lenses in a pair of contact lenses that can be used to read a book held 25.0 cm from the eyes.
4)Aseverely nearsighted person needs corective lenses. In one eye, this person can focus on objects over...
4)Aseverely nearsighted person needs corective lenses. In one eye, this person can focus on objects over a range from as close as 15.8cm to as far away as 69.1cm. A) What strength (in diopters) contact lens would correct the vision in this eye? B) If instead of contact lenses, this person were to get glasses, the lenses of the glasses will sit a distance of 1.9 cm from the person's eye. What strength lens (in diopters) would be needed for...
(1.) Nearsightedness (a.) A nearsighted person has a far point that is 323 cm from her eye. Her lens in a pair of glasses is 2 cm in front of her eye. What focal length is required to cast the image of a far-away object at her far point? (b.) If these glasses are used to view an object 525 cm from her eye, where do her glasses cast the image? In both cases, quote your distance as measured from...
8. A farsighted person has a near point located 210 cm away from the eyes. Determine the focal length of the converging lenses in a pair of contact lenses that can be used to read a book held 25.0 cm from the eyes.
4)Aseverely nearsighted person needs corective lenses. In one eye, this person can focus on objects over a range from as close as 15.8cm to as far away as 69.1cm. A) What strength (in diopters) contact lens would correct the vision in this eye? B) If instead of contact lenses, this person were to get glasses, the lenses of the glasses will sit a distance of 1.9 cm from the person's eye. What strength lens (in diopters) would be needed for...
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