This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: What power contact lens must be used to correct the vision of a nearsighted person whose far point ... (Read 142 times)

ts19998

  • Hero Member
  • *****
  • Posts: 531
on: Jul 29, 2018
What power contact lens must be used to correct the vision of a nearsighted person whose far point is 40 cm?
 
  A) 2.5 diopters
  B) -2.5 diopters
  C) -3.6 diopters
  D) -4.0 diopters
  E) 4.0 diopters

Question 2

The focal length of a thin lens is 40 mm and its aperture diameter is 10 mm. What is the f-number of this lens?
 
  A) f/4.0
  B) f/2.0
  C) f/5.6
  D) f/0.30
  E) f/0.40


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 29, 2018
Answer to Question 1

Thank you soo much

Answer to Question 2

A


ts19998

  • Member
  • Posts: 531
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

Kedrick2014

  • Member
  • Posts: 359
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Effect of changing a set point for hypothalamic values Effect of changing a set point for hypothalamic values
Tag identify that the power has been removed and service work is being done. Tag identify that the power has been removed and service work is being done.
a) Type IV hypersensitivity reaction, contact dermatitis as the result of reaction to the nickel in ... a) Type IV hypersensitivity reaction, contact dermatitis as the result of reaction to the nickel in ...
The Power of Classical Conditioning The Power of Classical Conditioning
Using the Power Rule for Derivatives Using the Power Rule for Derivatives
Constructing a Three-Point Recombination Map Constructing a Three-Point Recombination Map
Video: Uterine (menstrual) cycle - phases

For a complete list of videos, visit our video library