Sodium light and my experiment...

Please refrain from using non-English words in your posts/titles. The title of this thread has been edited. CE is read by engineers from over 180 countries. The primary language of CE is English.

sorry sir.. i will mind it next time ....

becuse there r monochromatic
n same phase

lamps have a borosilicate glass gas discharge tube (arc tube) containing solid sodium and a small amount of neon and argon gas Pennium mixture to start the gas discharge. The discharge tube may be linear (SLI lamp)<a href="https://en.wikipedia.org/wiki/Sodium-vapor_lamp#cite_note-1" target="_blank" rel="nofollow noopener noreferrer">Sodium Vapor Lamp Cite Note 1</a> or U-shaped. When the lamp is turned on it emits a dim red/pink light to warm the sodium metal and within a few minutes it turns into the common bright <a href="https://en.wikipedia.org/wiki/Yellow_%28colour%29" target="_blank" rel="nofollow noopener noreferrer">Yellow %28Colour%29</a>yellow as the sodium metal <a href="https://en.wikipedia.org/wiki/Vaporization" target="_blank" rel="nofollow noopener noreferrer">Vaporization</a>vaporizes. These lamps produce a virtually monochromatic light averaging at a 589.3 nm wavelength (actually two dominant spectral lines very close together at 589.0 and 589.6 nm). As a result, the colors of illuminated objects are not easily distinguished since they are seen almost entirely by their reflection of this narrow bandwidth yellow light.

hey got answer?