A person is nearsighted and can clearly focus on objects that are no farther than 3...
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?
Homework Answers
In this case image of the object at 2.25 m away is formed at 3 m away by the glass.
by lens formula,
9 m
Add Answer to:
A person is nearsighted and can clearly focus on objects that
are no farther than 3...
1. Mrs. Magoo is farsighted. She can only focus objects that are farther than 4 meters...
1.
Mrs. Magoo is farsighted. She can only focus objects that are
farther than 4 meters away from her eyes. She would like to be able
to read a book that 40cm from her eyes. If you were her
optometrist, what power glasses would you prescribe her assuming
the lenses sits 1cm from her eyes
1. Mrs. Magoo is farsighted. She can only focus objects that are farther than 4 meters away from her eyes. She would like to be...
Velma is extremely nearsighted, and has difficulty seeing anything which is further away than 1.5 meters...
Velma is extremely nearsighted, and has difficulty seeing anything which is further away than 1.5 meters from her face if she isn't wearing her glasses. Dexter also wears glasses, which correct his farsightedness; he can only see objects clearly when they are more than 50 cm from his eyes. Assuming that each of them wears glasses which are 1.5 cm from their eyes, and that a person with normal vision has a near point of 25 cm and a far...
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...
A person can see clearly up close, but cannot focus on objects beyond 82.0cm . She opts for contact lenses to corre...
A person can see clearly up close, but cannot focus on objects beyond 82.0cm . She opts for contact lenses to correct her vision. Part A Is she nearsighted or farsighted? Part B What type of lens (converging or diverging) is needed to correct her vision? Part C What focal-length contact lens is needed ?
Please provide a lot of detail when solving this question, thank you!: A person can see...
Please provide a lot of detail when solving this question, thank you!: A person can see objects clearly only if they are between 22cm and 82cm away. Assuming that the person is given glasses which sit 2cm from the eyes, what focal length should the glasses be to see things far away clearly?
With his right eye a nearsighted person cannot see clearly objects more than 1.2 m away....
With his right eye a nearsighted person cannot see clearly objects more than 1.2 m away. (a) What kind of vision defect has the patient? (b) What should be the type of the lens to correct this eye? (c) Determine the optical power and focal length of the lens
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...
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...
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 particular nearsighted person is unable to see objects clearly when they are beyond 3.0 cm...
A particular nearsighted person is unable to see objects clearly when they are beyond 3.0 cm away (the far point of the particular eye). What should the focal length be in a lens prescribed to correct the problem?
1.
Mrs. Magoo is farsighted. She can only focus objects that are
farther than 4 meters away from her eyes. She would like to be able
to read a book that 40cm from her eyes. If you were her
optometrist, what power glasses would you prescribe her assuming
the lenses sits 1cm from her eyes
1. Mrs. Magoo is farsighted. She can only focus objects that are farther than 4 meters away from her eyes. She would like to be...
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...
A particular nearsighted person is unable to see objects clearly when they are beyond 3.0 cm away (the far point of the particular eye). What should the focal length be in a lens prescribed to correct the problem?
Most questions answered within 3 hours.
-
A sample of ore containing manganese weighed 1.2354 grams. This
sample was heated in a solution...
asked 31 minutes ago -
In JAVA please (need answers in a few hours!)
Exercise #2: Design and implement a program...
asked 3 hours ago -
The mass spectrum of an organic compound shows the relative
abundances of M to be 53.76%...
asked 4 hours ago -
Coca Cola’s strategy of “think local, act local” represents a
__________ approach.
Question options:
1)
transnational...
asked 4 hours ago -
which of the following is not a category of project management
risk?
a) external
b) internal...
asked 5 hours ago -
Focus on Critical Thinking: Are citizen suit provisions an
effective way to achieve environmental objectives? Do...
asked 5 hours ago -
Gaseous butane CH3CH22CH3 will react with gaseous oxygen O2 to
produce gaseous carbon dioxide CO2 and...
asked 6 hours ago -
Required to construct counters using synchronous sequential
logic. Use one hex digit to display the result....
asked 6 hours ago -
(Ultra) Large-Scale Systems –Characteristics?
explain in detail
How the nature of an enterprise affect complex...
asked 6 hours ago -
Some of the antibiotic susceptible strains show colonies within
the clear zone. What it does this...
asked 7 hours ago -
In the lottery game Fantasy 5 you have to select 5 numbers from
the numbers {1,2,3,.......,38,39}....
asked 7 hours ago -
A call option on Jupiter Motors stock with an exercise price of
$80 and one-year expiration...
asked 6 hours ago