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Fluorescent lamp

  • Thread starter songoku
  • Start date
  • #1
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Homework Statement


Fluorescent lamps use phosphors to produce visible light from UV light. This is done by absorbing the UV light and then re-radiating it using a different wavelength. This is a

a. one way process
b. reversible process
c. process that produces continuous spectrum
d. process that produces a single wavelength only
e. process that is very inefficient.


Homework Equations





The Attempt at a Solution


I totally clueless....What should I understand first so that I can answer this question?

Thanks
 

Answers and Replies

  • #2
rl.bhat
Homework Helper
4,433
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Since we are switching on and off the fluorescent several times, it must be a ...........?
Fluorescent lamps produce line spectrum of several colors.
Finally do you prefer very inefficient lamps?
 
  • #3
1,329
45
Hi Mr. rl.bhat
Since we are switching on and off the fluorescent several times, it must be a ...........?
reversible process

Fluorescent lamps produce line spectrum of several colors.
It means that (c) and (d) are wrong

Finally do you prefer very inefficient lamps?
Of course no :smile:

Then I think the answer is (b).

But what is the basic to say that it's an efficient lamp?

Thanks
 
  • #4
rl.bhat
Homework Helper
4,433
7
Unlike filament lamp, there is no resistance where the energy is lost due to heating.
So for the same amount of energy consumption, more lumen of light is available in fluorescent lamp than in the filament lamp.
 
  • #5
1,329
45
Oh I see

Thanks a lot for your help, Mr. rl.bhat !!
 
  • #6

Homework Statement


Fluorescent lamps use phosphors to produce visible light from UV light. This is done by absorbing the UV light and then re-radiating it using a different wavelength. This is a

a. one way process
b. reversible process
c. process that produces continuous spectrum
d. process that produces a single wavelength only
e. process that is very inefficient.


Homework Equations





The Attempt at a Solution


I totally clueless....What should I understand first so that I can answer this question?

Thanks
My Tips:

Product Features:

* UV lamp illuminates invisible markings in an instant
* Don’t be caught out with fake currency
* Ideal for banknotes, credit cards, stamps, etc...
 
  • #7
60
0
Just a contribution; as far as i know Fluorescent lamps doesnt even generate heat when they are turned on,

Correct me if am wrong,

Cryphonus
 

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