Fringe pattern of a vapour lamp

AI Thread Summary
A sodium vapor lamp produces a dominant yellow color due to its monochromatic light emission at a specific wavelength. To observe a fringe pattern, additional optical elements, such as slits or diffraction gratings, are required, as a lamp alone does not generate fringes. The setup typically involves using the lamp in conjunction with a double-slit or interference apparatus. The resulting fringe pattern would display alternating light and dark bands, characteristic of wave interference. Understanding the setup is crucial for accurately sketching the expected fringe pattern.
aurao2003
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Homework Statement


Hi
Please, what fringe pattern would be obtained with a sodium vapour lamp?



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The Attempt at a Solution


I am guessing that a dominant yellow colour would be obtained. The sodium is almost acting like a monochromatic light and therefore has a particular wavelength. But I am not sure how correct my answer is. Also, what will the sketch look like? Please comment
 
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What is the setup?
You don't have fringes from just a lamp on it's own
 

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