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 105 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
:D TYSM

fatboyy09

  • Member
  • Posts: 358
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Mosaic of Charge-Coupled Devices (CCDs) Mosaic of Charge-Coupled Devices (CCDs)
A taxonomy of primate social systems. Larger symbols indicate adults. A taxonomy of primate social systems. Larger symbols indicate adults.
Major Wind Systems: Foehn, Chinook, and Santa Ana Winds Major Wind Systems: Foehn, Chinook, and Santa Ana Winds
Eukaryotic signal transduction systems involving membrane receptors (1–5)/ second messengers (1-4) Eukaryotic signal transduction systems involving membrane receptors (1–5)/ second messengers (1-4)
Systems of the Human Body Systems of the Human Body
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 ...
Video: Cardiac conductile cells

For a complete list of videos, visit our video library