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

Author Question: A person's eye lens is 2.8 cm away from the retina. What must the focal length of this lens be in ... (Read 90 times)

abern

  • Hero Member
  • *****
  • Posts: 533
on: Jul 29, 2018
A person's eye lens is 2.8 cm away from the retina. What must the focal length of this lens be in order for an object placed at the far point of the eye to focus on the retina?
 
  A) -2.8 cm
  B) 2.8 cm
  C) -2.4 cm
  D) 2.4 cm
  E) 2.2 cm

Question 2

Which of these lamps has no mercury content?
 
  A) fluorescent lamp
  B) CFL
  C) incandescent lamp
  D) none of the above


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

6ana001

  • Sr. Member
  • ****
  • Posts: 311
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

Answer: C


abern

  • Hero Member
  • *****
  • Posts: 533
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


6ana001

  • Sr. Member
  • ****
  • Posts: 311
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.

Variation in shape and length of nerve cells. Variation in shape and length of nerve cells.
Relative Energy Consumption per Person for Selected Countries Relative Energy Consumption per Person for Selected Countries
A well-folded letter fits easily into the envelope and is easily removed by the person who receives ... A well-folded letter fits easily into the envelope and is easily removed by the person who receives ...
(A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ... (A) In hyperopia, light rays focus behind the retina, making it difficult to focus on objects at ...
If toes are curled, straighten them with effleurage along the length of each toe. Use thumb on top ... If toes are curled, straighten them with effleurage along the length of each toe. Use thumb on top ...
What is the length of the staircase? What is the length of the staircase?
Video: Introduction to Dysrhythmia

For a complete list of videos, visit our video library