Why can't sodium vapour lamp be used in spectrometer experiment

Click For Summary

Discussion Overview

The discussion centers around the use of sodium vapor lamps versus mercury vapor lamps in spectrometer experiments, specifically regarding the refractive index of a prism for various colors. Participants explore the reasons for the preference of mercury vapor lamps over sodium vapor lamps.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions why sodium vapor lamps are not suitable for the experiment, suggesting a need for clarification on their limitations.
  • Another participant inquires about the number of colors emitted by sodium vapor lamps compared to mercury vapor lamps, indicating a focus on the spectral output of each lamp.
  • A different participant raises a concern regarding the visibility of certain wavelengths emitted by mercury vapor lamps, specifically mentioning ultraviolet light and potential eye safety issues.
  • Further inquiries are made about the differences in the spectral characteristics of sodium and mercury lamps, particularly in terms of the colors they produce.
  • Links to external resources are provided, suggesting that they contain illustrations or explanations supporting the preference for mercury lamps.

Areas of Agreement / Disagreement

Participants express differing views on the suitability of sodium vapor lamps for spectrometer experiments, with no consensus reached on the specific reasons for the preference of mercury vapor lamps.

Contextual Notes

Participants have not fully explored the implications of the spectral differences or the specific safety concerns related to ultraviolet light, leaving these aspects unresolved.

harini_5
Messages
36
Reaction score
0
i was working with a spectrometer and the aim of the experiment was to find the refractive index of a prism for various colors.
i was asked specifically to use mercury vapor lamp and was insisted not to use sodium vapour lamp.
why is it so?
 
Science news on Phys.org
harini_5 said:
for various colors.
How many colors are in a Na vapor lamp?
How many in an Hg
 
And the ones you can't see in Hg can be a eye safety concern. i.e. Ultraviolet.

Hopefully precautions are being taken.
 
mgb_phys said:
How many colors are in a Na vapor lamp?
How many in an Hg

sir can u please tell me the difference between the two spectra,interms of colors etc?
 
FG04_03.jpg

http://physics.uoregon.edu/~jimbrau/astr122/Notes/Chapter3_4.html"
 
Last edited by a moderator:
dlgoff said:
FG04_03.jpg

http://physics.uoregon.edu/~jimbrau/astr122/Notes/Chapter3_4.html"

A wonderful illustration of why mercury is preferable to sodium.
 
Last edited by a moderator:

Similar threads

  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 7 ·
Replies
7
Views
3K
Replies
9
Views
3K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 207 ·
7
Replies
207
Views
14K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 17 ·
Replies
17
Views
8K