Chemistry

Describe the spectrum of the light from a fluorescent lamp and from an incandescent (tungsten filament) lamp, and try to explain what you observe.

So fluorescent lamps use electricity to excite mercury vapour, and the excited atoms produce short-wave UV light which causes a phosphor (from the phosphorescent coating) to fluoresce, producing visible light.

Incandescent light bulbs use electric current to flow through a tungsten wire which gets heated to the point where it begins to emit thermal radiation.. but I'm not exactly sure how this gets transmitted into visible light?

Can someone please help me out with these explanations? Maybe explain the specific emission spectra of each type of light and why it produces the light it does? I'm confused. And the explanations online are getting really complex

  1. 👍 0
  2. 👎 0
  3. 👁 195
asked by Jon
  1. The fluorescent light sounds good to me. You started the W light great, too, but tailed off. The W wire is heated to incandescence (hence the name?) and it emits what appears to be white light if one looks at it; however, it is a continuous spectrum running from very little in the violet, more in the green and red and a rather large amount of infrared radiation. It is visible light because the W wire glows so brightly it actually is visible light. Look at a W bulb and you will see how bright it is. I suggest a small wattage bulb. I have some night lights in my bathroom that are 4 watts and you can see the glow and the color.

    1. 👍 0
    2. 👎 0
    posted by DrBob222

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physic

    A lamp filament is made of tungsten. Why do we get a continuous spectrum rather than a tungsten line spectrum when light from an incandescent lamp is viewed with a spectroscope?

    asked by shelly on December 11, 2012
  2. Physics

    A lamp fimament is made of tungsten. Why do we get a continuous spectrum rather than a tungsten line spectrum when light from an incandescent lamp is viewed with a spectroscope?

    asked by Leigh on March 27, 2008
  3. science!!

    The element in an incandescent light bulb that releases light energy is _____. I think its C a thin tungsten filament. Am i right? below are the choices: A.a phosphor B.mercury vapor C.a thin tungsten filament D.a thick tungsten

    asked by :) on June 2, 2010
  4. Physical Sci

    An incandescent light bulb produces light when electrons flow through the (1 point) * air. * glass. * filament. * vacuum. 2. Many streets and parking lots are illuminated with (1 point) * laser lights. * tungsten-halogen lights. *

    asked by Roses on April 18, 2018
  5. Physics

    The typical resistance of the tungsten filament of a 60 watt incandescent light bulb when it is turned off is 24 ohms and its resistance when operating from a 120 volt power source is 240 ohms. Generally, an incandescent light

    asked by Joseph on February 23, 2010
  6. physics

    The filament in an incandescent light bulb is made from tungsten. The light bulb is plugged into a 240 V outlet and draws a current of 1.16 A. If the radius of the tungsten wire is 0.0052 mm, how long must the wire be?

    asked by Anonymous on January 19, 2011
  7. ipc

    investigate and compare economic and environmental impacts of incandescent light bulbs versus the various fluorescent lamps, solar lamp, and oil burning lamp or candles.

    asked by poo on April 13, 2011
  8. English

    Choose the answer that best matches the word "incandescent" One way to save money on electricity is to replace incandescent bulbs with compact fluorescent (CF) light bulbs. a. outside visible spectrum b. creating light by

    asked by Kaai97 on October 26, 2015
  9. physics

    1A) A filament lamp- cost- 80p effiency- 0.2 expected life- 1000 hours a compact fluorescent lamp (CFL)- cost- £3.00 effiency- 0.8 expected life- 8000 hours a filament lamp with a power rating of 100W gives 2000 units of light.

    asked by 4611star on February 29, 2012
  10. chemistry

    The diameter of the tungsten wire in a light bulb filament is bery small, less than two thousandths of an inch, or about 1/20 mm. THe mass of the filament is so very small - 0.0176 grams - that it would take 1,600 filaments to

    asked by Crsa on February 1, 2010

More Similar Questions