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

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A sodium lamp produces a line emission spectrum due to the excitation and subsequent relaxation of sodium atoms, releasing specific wavelengths of yellow light. In contrast, a candle flame emits a continuous spectrum, resulting from the combustion of paraffin wax, which includes a range of wavelengths due to various elements and compounds in the wax. The yellow appearance of both light sources can be misleading, as their spectral compositions are fundamentally different. The sodium lamp's spectrum is discrete, while the candle's is broad and continuous, often containing additional colors and black soot. Understanding these differences highlights the distinct physical processes involved in light emission from each source.
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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
 
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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.
 
Thank you! i get it now
 
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