- Scan Question
- + Post
- Get Coins
The far point of a nearsighted person is 4.9 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 23.1 m away and 1.6 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image formed by the contacts?
The far point of a nearsighted person is 4.9 m from her eyes, and she wears...
The far point of a nearsighted person is 6.9 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 14.8 m away and 2.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image formed by the contacts?
(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...
The contacts worn by a farsighted person allow her to see objects clearly that are as close as 25.0 cm, even though her uncorrected near point is 75.0 cm from her eyes. When she is looking at a poster, the contacts form an image of the poster at a distance of 162 cm from her eyes. (a) How far away is the poster actually located? (b) If the poster is 0.310 m tall, how tall is the image formed by...
A nearsighted student wears contact lenses to correct for a far point that is 4.50m from her eyes. When she is not wearing her contact lenses, her near point is 24cm What is her near point when she is wearing her contacts? Express your answer using two significant figures.
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
Your nearsighted instructor cannot focus clearly on objects more distant than 150 cm from her eyes. What power lenses are required for her to see distant students clearly?
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...
A nearsighted person wears contact lenses of refractive power -6.0 D. What is her far point? 17 cm 6.0 cm -17 cm -4.0 cm -6.0 cm
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....
A person is nearsighted and can clearly focus on objects that are no farther than 3 m away from her eyes. She borrows a friend's glasses but the borrowed glasses make things worse; that is, the person can now focus only on objects that are within 2.25 m away. What is the focal length of the borrowed glasses?