1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lilit [14]
3 years ago
12

If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses that th

e person would need to see an object at infinity clearly?
If a farsighted person has a near point that is 0.600m from the eye, what is the focal length f2 of the contact lenses that the person would need to be able to read a book held at 0.350m from the person's eyes?

Physics
1 answer:
olga55 [171]3 years ago
3 0

Answer:

f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

Explanation:

A person is nearsighted when the person's far point is less than infinity. A diverging lens is normally used to correct this eye defect. A diverging lens has a negative focal length as seen in the solution attached.

Farsightedness is when a person's near point is farther than 25cm. This eye defect is corrected using a converging lens. The focal length of a converging lens is positive. This is evident in the solution attached. The near point is also referred to as the least distance of distinct vision.

You might be interested in
Reggie can do 50 pushups in one minute. If the mass that Reggie is lifting which each push-up is at 92 kg, what must also be mea
Sergio039 [100]
The missing measurement is distance.
8 0
3 years ago
PLEASE HELP ME TIMED TEST!!!
malfutka [58]

Answer:

56

Explanation:

I just want the points to be completely honest with you.  

7 0
2 years ago
Read 2 more answers
Name one reason why you should pour milk in before cereal.
krok68 [10]

Answer:

splashing

Explanation:

if you put in the cereal after the milk it will splash everywhere, causing a waste of milk, and a loss of time.

5 0
3 years ago
Why x ray is called an electromagnetic wave<br>​
Dahasolnce [82]
Because they behave just like all the electromagnetic waves of the spectrum. Same equations, just shorter wavelengths and more energy.

Hope you get it :)
7 0
2 years ago
How do you break apart a
Tcecarenko [31]

Answer:

B

Explanation:

Depends Mostly on bonds electrolysis can be used, chemical bonding like additional of water or by heating back to their elements.

3 0
2 years ago
Read 2 more answers
Other questions:
  • What is polarization?
    8·1 answer
  • When warm air collides with cold air and droplets are formed it is called?
    14·2 answers
  • Unit of work is derived unit why​
    7·1 answer
  • Which New York State landscape region is mostly composed of horizontal sedimentary bedrock at high elevations?A. Hudson Highland
    11·1 answer
  • Which is a good example of a contact force?
    7·2 answers
  • Consider a wave along the length of a stretched slinky toy, where the distance between coils increases and decreases. What type
    14·2 answers
  • A rightward force of 460 N is applied to a 286-kg crate to accelerate it across the floor
    5·1 answer
  • How to decrease gender based violence​
    12·1 answer
  • Why does lowering the temperature of an object increase its density
    7·1 answer
  • On being introduced to the laws of thermodynamics, a student retorted, “When the brakes of a moving car are applied, the kinetic
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!