« previous next »

Author Question: The ability to distinguish between two objects that are situated close to one another as separate ... (Read 27 times)

PhilipSeeMore

  • Hero Member
  • *****
  • Posts: 561
on: Jun 25, 2018
The ability to distinguish between two objects that are situated close to one another as separate entities is:
 
  a. Resolution
  b. Parfocal
  c. Contrast
  d. Parcentric

Question 2

What solution is best for cleaning lenses?
 
  a. Commercial glass cleaning solution (e.g., Windex)
  b. Water
  c. Benzene
  d. Xylol


Sweetkitty24130

  • Sr. Member
  • ****
  • Posts: 291
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: A
Resolution is the ability to distinguish between two objects that are situated closely together as two distinct entities. Contrast makes an image sharper (i.e., clearer), but does not affect resolution. If lenses are parfocal, then moving from one objective to another will require only minor adjustments in the fine focus. If they are parcentric, then an object in the center of one field using one lens will be close to the center when another objective is moved into position.

Answer to Question 2

ANS: A
A commercial glass cleaning solution is best used for cleaning lenses. Water will often only smudge anything present, especially on an oil immersion lens. Benzene and xylol are solvents that are carcinogenic and should not be used.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

PhilipSeeMore

  • Hero Member
  • *****
  • Posts: 561
Reply #2 on: Jun 25, 2018
Thank you


Sweetkitty24130

  • Sr. Member
  • ****
  • Posts: 291
Reply #3 on: Jun 25, 2018
No problemo


« previous next »
 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

The Spinal Cord, The Spinal Cord and Spinal Nerves; Close-up of the Caudal Region of the Spinal Nerv The Spinal Cord, The Spinal Cord and Spinal Nerves; Close-up of the Caudal Region of the Spinal Nerv
Three Close Binaries Three Close Binaries
To cleanse an open wound, begin close to the wound and work outward in full or half circles. To cleanse an open wound, begin close to the wound and work outward in full or half circles.
Dolphin’s ability to understand an artificial language Dolphin’s ability to understand an artificial language
Salt grains up close Salt grains up close
Video: Knee Animation

For a complete list of videos, visit our video library