What is the difference in spectra between a sodium lamp and a candle flame?

[bettysuarez]

Homework Statement

Hi,
I'm having a bit of trouble explaining this physics phenomenon:

A sodium lamp emits yellow light; that to the human eye appears to be quite similar to a
candle flame in colour. When light from these two sources is viewed through a
spectroscope, it is found that their spectra are very different. Explain the differences in the
two spectra produced.

I understand that when the electrons of the sodium atoms are excited and fall down to ground state they will release a yellow photon, which explains the line emission spectra from the lamp but I don't know what spectra will be produced by the candle.

Thank you!

Homework Equations

No relevant equations

The Attempt at a Solution

see above

 

[rock.freak667]

Here is a hint: Candle wax contains paraffin. So when this burns it contains an element that burns yellow as it is being oxidized. This element also forms as black soot sometimes.

 

[bettysuarez]

Thank you! i get it now