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?
Homework Answers
For a normal eye, the near point is 25.0 cm. This is where you would like...
For a normal eye, the near point is 25.0 cm. This is where you would like to place the printed material such as the newspaper to read. The far point is very far away. What type and focal length corrective contact lens should a nearsighted person whose far point is 80.0 cm wear? What is the power of this lens? What type and focal length corrective contact lens should a farsighted person wear if the persons near point is 60.0...
(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 farsighted person has a near point of 100cm. A corrective lens needs to create a...
A farsighted person has a near point of 100cm. A corrective lens needs to create a virtual image at this distance if an object is placed at 25 cm. a. What power (in diopters) lens is needed? b. What type of lens is this? (diverging or converging)
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...
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.
Calculate the near point of a farsighted person if she was prescribed a corrective lens of...
Calculate the near point of a farsighted person if she was prescribed a corrective lens of power +2.00 diopters. Calculate the far point of a nearsighted person if she was prescribed a corrective lens power of -1.5 diopters.
A person sees clearly wearing eyeglasses that have a power of -3.00 diopters when the lenses...
A person sees clearly wearing eyeglasses that have a power of -3.00 diopters when the lenses are 1.80 cm in front of the eyes. (a) What is the focal length of the lens? cm (b) is the person nearsighted or farsighted? O nearsighted farsighted (C) If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed? diopters Need Help? Read it
A particular patient's eyes are unable to focus on objects closer than 34.5 cm and corrected...
A particular patient's eyes are unable to focus on objects closer than 34.5 cm and corrected lenses are to be prescribed so that the patient can focus on objects 22.0 cm from their eyes HINT (a) is the patient nearsighted or farsighted? O nearsighted O farsighted (b) If contact lenses are to be prescribed, determine the required lens power (in diopters). diopters (c) veglasses are to be prescribed instead and the distance between the eyes and the lenses is 1.80...
Claudia is nearsighted. She has a near point of 12 cm and a far point of...
Claudia is nearsighted. She has a near point of 12 cm and a far point of 17 cm. If the corrective lens is 2.0 cm from Claudia’s eye, what lens power will enable her to see distant objects clearly? -6.7 diopters +8.5 diopters -5.3 diopters – 17 diopters
(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...
A farsighted person has a near point of 100cm. A corrective lens needs to create a virtual image at this distance if an object is placed at 25 cm. a. What power (in diopters) lens is needed? b. What type of lens is this? (diverging or converging)
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.
A person sees clearly wearing eyeglasses that have a power of -3.00 diopters when the lenses are 1.80 cm in front of the eyes. (a) What is the focal length of the lens? cm (b) is the person nearsighted or farsighted? O nearsighted farsighted (C) If the person wants to switch to contact lenses placed directly on the eyes, what lens power should be prescribed? diopters Need Help? Read it
A particular patient's eyes are unable to focus on objects closer than 34.5 cm and corrected lenses are to be prescribed so that the patient can focus on objects 22.0 cm from their eyes HINT (a) is the patient nearsighted or farsighted? O nearsighted O farsighted (b) If contact lenses are to be prescribed, determine the required lens power (in diopters). diopters (c) veglasses are to be prescribed instead and the distance between the eyes and the lenses is 1.80...
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