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

Author Question: Which of the following devices use lasers? a. DVD players b. fiber optics communication systems ... (Read 116 times)

sdfghj

  • Hero Member
  • *****
  • Posts: 552
on: Jul 28, 2018
Which of the following devices use lasers?
 a. DVD players
  b. fiber optics communication systems
  c. photocopiers
  d. UPC price scanners

Question 2

In which of the following energy level transitions for a hydrogen atom is a photon emitted?
 a. n =1 to n = 2
  b. n =3 to n = 2
  c. n =2 to n = 1
  d. n =1 to n = 4
  e. n =4 to n = 3


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fatboyy09

  • Sr. Member
  • ****
  • Posts: 358
Reply #1 on: Jul 28, 2018
Answer to Question 1

A, B, D

Answer to Question 2

B, C, E


sdfghj

  • Member
  • Posts: 552
Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

sarah_brady415

  • Member
  • Posts: 328
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

Communication by direct contact between cells. Communication by direct contact between cells.
Communication during assessment Communication during assessment
Therapeutic Communication Skills Therapeutic Communication Skills
Geothermal energy and powers Earth’s systems Geothermal energy and powers Earth’s systems
A company that makes environmental measuring devices has calculated their revenue and costs as ... A company that makes environmental measuring devices has calculated their revenue and costs as ...
Functional divisions of vertebrate nervous systems Functional divisions of vertebrate nervous systems
Video: How proteins function? How do proteins work?

For a complete list of videos, visit our video library