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 74 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
Excellent

nothere

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

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?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

The vertebrate single-lens eye. The vertebrate single-lens eye.
Vision. Normal vision and vision problems. Vision. Normal vision and vision problems.
Bulging Eyes Of The Tarsier Provide Insight Into Evolution Of Human Vision Bulging Eyes Of The Tarsier Provide Insight Into Evolution Of Human Vision
When the United States gets stuck over a controversial issue—usually something a divided Congress ca When the United States gets stuck over a controversial issue—usually something a divided Congress ca
Durable power of attorney. Durable power of attorney.
Constructing a Three-Point Recombination Map Constructing a Three-Point Recombination Map
Video: Cell mediated immune response to a viral infection Animation

For a complete list of videos, visit our video library