When bulb light passes through a prism

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When bulb light passes through a prism why doesn't it give different colors?

From what I understood about light bulbs, it should give red, orange and yellow as descrete lines. Why doesn't this happens and it goes out of the prism almost as it enters?

Thanks
 

Answers and Replies

  • #2
Danger
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I've never heard of that. Maybe the light source is just overpowering (washing out) the separate colour bands. Try shrouding it so it all goes through the prism.
 
  • #3
rachmaninoff
Physicist said:
When bulb light passes through a prism why doesn't it give different colors?
From what I understood about light bulbs, it should give red, orange and yellow as descrete lines. Why doesn't this happens and it goes out of the prism almost as it enters?
Thanks
I assume you have a flourescent light "bulb"? Incandescent light bulbs don't emit in discrete lines, but continuous spectra, just like the sun.

Are you projecting onto a white surface? What exactly do you see?
 
  • #4
Janus
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Physicist said:
When bulb light passes through a prism why doesn't it give different colors?
From what I understood about light bulbs, it should give red, orange and yellow as descrete lines. Why doesn't this happens and it goes out of the prism almost as it enters?
Thanks
Are you passing the light through a slit before it reaches the prism, or are you just holding the prism up to the light from a light bulb?
 
  • #5
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Incandescent light bulbs don't emit in discrete lines, but continuous spectra, just like the sun.
Oh thanks... I've just noticed this piont. Because in my mind I was comparing it with the case of Helium spectrum :redface:

Are you passing the light through a slit before it reaches the prism
yes..

I'm confused because the light came out of the prism almost as a line. Ok.. maybe because it doesn't have many colors so the spectrum is not very wide and that make it looks almost almost as a line. Am I right?
I need to try it again..

Thanks everyone
 
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