« previous next »

Author Question: White-light LEDs employ A) phosphors. B) white-emitting diodes. C) extra-high electrical ... (Read 64 times)

newbem

  • Hero Member
  • *****
  • Posts: 579
on: Jul 29, 2018
White-light LEDs employ
 
  A) phosphors.
  B) white-emitting diodes.
  C) extra-high electrical barriers.
  D) none of the above

Question 2

Which of these lamps employs semi-conductor technology?
 
  A) incandescent lamp
  B) fluorescent lamp
  C) CFL
  D) LED


scottmt

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Absorbance of Light by Rods and Cones Absorbance of Light by Rods and Cones
Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery Frederick Douglass, having escaped from slavery in 1836, attracted large audiences as an antislavery
Development of the light microscope Development of the light microscope
A chest X-ray showing pneumonia characterized by the patch of gray-white areas. A chest X-ray showing pneumonia characterized by the patch of gray-white areas.
Interactions of Light and Matter Interactions of Light and Matter
Plan of the Anu Ziggurat and White Temple Plan of the Anu Ziggurat and White Temple
Video: Interview with Person having Obsessive Compulsive Disorder

For a complete list of videos, visit our video library