2) Waifer X’s near point is 0.700m. a) Is Waifer X farsighted or nearsighted? e) What...
2) Waifer X’s near point is 0.700m. a) Is Waifer X farsighted or nearsighted? e) What prescription contact lenses does she need (in diopters) to be able to see things that are 0.25m away? c) Does Waifer X need converging or diverging contact lenses in order to have normal vision? b) Is her relaxed f too long or too short? d) What distance from Waifer X do these contact lenses have to put images of objects that are 0.25m away in order for Waifer X to see them?
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2) Waifer X’s near point is 0.700m. a) Is Waifer X farsighted or
nearsighted? e) What...
A nearsighted person can see images crisply to a far point of 50 cm away. A farsighted person can...
A nearsighted person can see images crisply to a far point of 50 cm away. A farsighted person can see that same distance. Prescribe contact lenses for both these people. Answer in diopters.
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power...
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is +5/3 diopters. Since these eyeglasses do not completely correct her vision, she must hold a newspaper 42.00 cm from her eyes in order to read it. She wears the eyeglasses 2.00 cm from her eyes. a.What is the focal length of the lenses? b.Are the lenses converging or diverging? Why? c.How far is her near point from her eyes? d.In order to be...
With a near point of 15.0 cm, a nearsighted professor can focus on relatively nearby objects....
With a near point of 15.0 cm, a nearsighted professor can focus on relatively nearby objects. Yet, with a far point 62.0 cm out, he cannot clearly see distant objects without optical ald. (a) Calculate the focal length (in cm) of a contact lens that would enable this professor to clearly view very distant objects. (Hint: Allow p to approach Infinity in the thin-lens equation). (b) What power (in diopters) describes this contact lens? diopters (c) When this contact lens...
With a near point of 12.0 cm, a nearsighted technician can focus on relatively nearby objects....
With a near point of 12.0 cm, a nearsighted technician can focus on relatively nearby objects. Yet, with a far point 58.0 cm out, he cannot clearly see distant objects without optical aid. (a) Calculate the focal length (in cm) of a contact lens that would enable this technician to clearly view very distant objects. (Hint: Allow p to approach infinity in the thin-lens equation). (b) What power (in diopters) describes this contact lens? (c) When this contact lens is...
1. Susan is quite nearsighted; without her glasses, her far point is 52 cm and her...
1. Susan is quite nearsighted; without her glasses, her far point is 52 cm and her near point is 16 cm. Her glasses allow her to view distant objects with her eye relaxed. (a) Are the lenses of her glasses converging or diverging? (b) Find the focal length of the lenses of her glasses. (c) Find her near point while wearing her glasses. (d) Find the minimum power of the lens she should use as a magnifier in order to...
Background information A person with normal vision can focus on objects as close as a few centimeters from the eye up...
Background information A person with normal vision can focus on objects as close as a few centimeters from the eye up to objects infinitely far away. There exist, however, certain conditions under which the range of vision is not so extended. For example, a nearsighted person cannot focus on objects farther than a certain point (the far point), while a farsighted person cannot focus on objects closer than a certain point (the near point). Note that even though the presence...
8. Your nearsighted brother has a far point of 4 m and he wants to see...
8. Your nearsighted brother has a far point of 4 m and he wants to see an object 15 m away clearly Assume he will wear his glasses 2 cm in front of his eyes. What is the focal distance (in meters) of the glasses he needs? Hint: Draw a diagram of your brother, the glasses, the object and the image. Use the diagram to figure out whether the glasses have to be diverging or converging. 9. Consider question 8....
S. We expect the normal eye to have a near point at 15 cm and a...
S. We expect the normal eye to have a near point at 15 cm and a far point at infinity. A nearsighted patient comes for corrective contact lenses with a near point at 15 cm and a far point at 60 cm a) What type of lens will this patient need? Find ffor the correcting lens, and its strength in diopters. b) When wearing these lenses, where does the patient's near point appear to be? c) Recalculate the strength in...
A child's far point is 127 cm and her near point is 12.5 cm In what...
A child's far point is 127 cm and her near point is 12.5 cm In what follows, we assume that we can model the eye as a simple camera, with a single thin lens forming a real image upon the retina. We also assume that the child's eyes are identical, with each retina lying 1.90 cm from the eye's "thin lens." (1) What is the power, P, of the eye when focused upon the far paint? (Enter your answer in...
NEED HELP ON #2 A nearsighted pharmacy student has eyes who have a relaxed refractive power...
NEED HELP ON #2 A nearsighted pharmacy student has eyes who have a relaxed refractive power of 49 diopters and her retina is 2.3 cm from her lens. 1). If she is nearsighted, what is her far point? If she is far-sighted, what is her near-point? .1804 m 2) Let's say she wants to be able to focus clearly on objects that are from 150 m to 6.5 cm away. What is the power of the corrective lens she should...
With a near point of 15.0 cm, a nearsighted professor can focus on relatively nearby objects. Yet, with a far point 62.0 cm out, he cannot clearly see distant objects without optical ald. (a) Calculate the focal length (in cm) of a contact lens that would enable this professor to clearly view very distant objects. (Hint: Allow p to approach Infinity in the thin-lens equation). (b) What power (in diopters) describes this contact lens? diopters (c) When this contact lens...
8. Your nearsighted brother has a far point of 4 m and he wants to see an object 15 m away clearly Assume he will wear his glasses 2 cm in front of his eyes. What is the focal distance (in meters) of the glasses he needs? Hint: Draw a diagram of your brother, the glasses, the object and the image. Use the diagram to figure out whether the glasses have to be diverging or converging. 9. Consider question 8....
S. We expect the normal eye to have a near point at 15 cm and a far point at infinity. A nearsighted patient comes for corrective contact lenses with a near point at 15 cm and a far point at 60 cm a) What type of lens will this patient need? Find ffor the correcting lens, and its strength in diopters. b) When wearing these lenses, where does the patient's near point appear to be? c) Recalculate the strength in...
A child's far point is 127 cm and her near point is 12.5 cm In what follows, we assume that we can model the eye as a simple camera, with a single thin lens forming a real image upon the retina. We also assume that the child's eyes are identical, with each retina lying 1.90 cm from the eye's "thin lens." (1) What is the power, P, of the eye when focused upon the far paint? (Enter your answer in...
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