When bulb light passes through a prism

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    Bulb Light Prism
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Discussion Overview

The discussion revolves around the behavior of light from a bulb when it passes through a prism, specifically why it does not produce distinct colors as expected. Participants explore the nature of the light emitted by different types of bulbs and the conditions under which the light is observed.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why bulb light does not produce different colors when passed through a prism, expecting discrete lines similar to those from a helium spectrum.
  • Another participant suggests that the intensity of the light source may wash out the separate color bands, recommending to shroud the light source for better observation.
  • A participant clarifies that incandescent light bulbs emit a continuous spectrum rather than discrete lines, comparing it to sunlight.
  • There is a suggestion to consider whether the light is being passed through a slit before reaching the prism, which may affect the observed outcome.
  • A participant expresses confusion about the appearance of the light exiting the prism, speculating that the limited range of colors in the bulb's spectrum may cause it to appear almost as a line.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the reasons for the observed behavior of light through the prism, with multiple competing views and uncertainties remaining regarding the nature of the light emitted by bulbs and the experimental setup.

Contextual Notes

Participants mention the dependence on the type of light bulb used (incandescent vs. fluorescent) and the conditions under which the light is observed (e.g., using a slit). There is also an acknowledgment of the continuous spectrum emitted by incandescent bulbs compared to discrete lines from other sources.

Physicist
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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 discrete lines. Why doesn't this happens and it goes out of the prism almost as it enters?

Thanks
 
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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.
 
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 discrete 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?
 
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 discrete 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?
 
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
 
Last edited:

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