Sodium Absorption Lines
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- เผยแพร่เมื่อ 26 ธ.ค. 2024
- Burning of sodium bicarbonate in Bunsen flame produces sodium absorption lines in continuous spectrum. Sodium 'D' line absorption shows up as a black line in the yellow of a continuous spectrum. Good as a simulation of the sodium portion of the Fraunhoffer absorption spectrum caused by atoms in the solar atmosphere; it does not however, resolve the 5890/5896Å doublet.
For more details, see
sciencedemonstr...
Wow the audio on this just takes it to the next level.
00:27 i love how he just drops the box and acts like nothing happaned
I played this back like 7 times and couldn't stop laughing. Can you believe I'm a chemist! I love him for keeping it in the vid though. LOL
It observed Orange spectrum
@@tonyellen_ 😄
That's how school needs to teach their students....BTW I loved your demonstration...❤❤💥🌪
Not all schools can afford this equipment
@@shera-cheraboutelaskformor4470 yeah you are also correct but the ones which are capable of showing this simply don't care ....not all but yeah...most of the schools (even who are capable) don't care
I taught intro physics at Texas State University. We had a DVD series with videos similar to this one. It is a lot more cost effective for school districts to buy a DVD set rather than buy specialized equipment for each experiment. The students always enjoy hands on experiments, such as the Kundt tube. But a set of videos saves the instructor a lot of time for setup and saves the school district lots of money
Do you have any articles in The Physics Teacher or similar periodical? 🏆subbed!
This 2 minute makes crystal clear...... thanks sir .love from india...💗💗♥️♥️♥️♥️
Me too🎉
This video is helpful for me to understand four lines that have given in my book
Thankyou
Wow I finally got to see it demonstrated. Thank it is great.
Wow Amazing Video This Made The Experiment more clear...
Nice demo! Ive trying to replicate it for a chemistry lesson. Why do you have two prism inside that brass thing?
Thanks. The special Amici prism we use is nice because the colors emerge along the optical axis of the light source.
Brilliant demonstration
This is a beautiful demonstration!
I
From Arjuna Batch ❤😂
Nice experiment. THIS VIDEO VERY HELPFUL FOR ME.
Nikhil sir❤
Yes
It Was really Amazing Practical Demonstration
That's a really nice old box!
He just only do experiment he save my life
wow thats really cool actually
How can he just make a demostration video like a form of art
Incredible experiment
Can I put your video in my electronic textbook?
Where one can find a projector like this??
The one we use here is a Slide King, a very handy light source for lecture demonstrations. You might be able to find one on eBay?
Thanks for the reply. What you enter in it to make the light a line source??
@@HassaanFareed We use a special "slide", which is simply a rectangular piece of aluminum with a vertical slit cut in the middle of it.
Thank you so much for your reply. I will search for these projectors in my country. Because amazon do not ship to my country
If there is any easy alternative please tell me
bery nice video and now i can understand and precept the meaning of Sodium spectrum
Thank for making this video.
Thank you so much, it's been helpful
Students loved this one :)
Glad to hear it!
Page 428-1
[F] (Phys) = A Fraunhofer line in the blue of the solar spectrum of wavelength 486.1527 nm. It is the second line in the Balmer hydrogen series, known also as HB.
Page 477
frown (T) = vb 1 (intr) to draw the brows together and wrinkle the forehead, esp. in worry, anger, or concentration. 2 (intr; foll. by on or upon) to look disapprovingly (upon). 3 (tr) to express (worry, etc.) by frowning. ▪n 4 the act of frowning. 5 a show of dislike or displeasure. [C14: from OF froigner, of Celtic origin]
> 'frowner n >'frowningly adv
THESAURUS
frown vb 1 = scowl, give a dirty look, glare, glower, knit one's brows, look daggers, lour or lower 2 foll. by on or upon = disapprove of, discountenance, discourage, dislike, look askance at, not take kindly to, show disapproval or displeasure, take a dim view of, view with disfavour.
Page 66
askance (T) or askant = adv 1 with an oblique glance. 2 with doubt or mistrust. [C16: from ?]
THESAURUS
askance adv As in look askance at 1 = out of the corner of one's eye, awry, indirectly, obliquely, sideways, with a side glance 2 = suspiciously, disapprovingly, distrustfully, doubtfully, dubiously, mistrustfully, sceptically
Hi, what kind of equipment can someone use to project on the wall a magnification of the emission lines of let's say Helium?
For observing emission lines of helium and other gases we usually hand out small diffraction gratings for students to look through.
You can make a simple spectrometer that fits over your phone camera. So while it's not a direct, magnified view, you could share it to a tv screen for all to see. Search youtube and you should find it easily.
Totaly amazing !
Beautiful
how can i contact the one who did the experiment, or someone who knows a lot about this, i really need help.
Really amazing.
can you guys help me out here, im gonna use this as inspiration for my exam report, but thing is i dont know where i can get the light source that is used in this video. can anybody help me with finding an alternative, or do you guys know if i can use a normal projector for the light source?
0:24 are you sure that's the continuum spectrum of visible light? It looks more like the portuguese flag.
just kidding. but all the figures on books shows a much broader yellow-orange transition... why is that? is about the gear or this is the real deal and books are only enhance for clarification?
wonderful video.
Yes the situation here is complicated by the camera and its white balance setting. The projector lamp that we're using is tungsten, which glows at about 3200-3400 Kelvin (this is a lower, "redder" temperature than daylight on a sunny afternoon). The camera was set to white balance for tungsten, so it was biasing the colors to favor green and blue so that the slit of light seen at 0:17 appears white.
...Graphical representations you may have seen of the visible spectrum are probably biased differently.
Is the absorption wavelength was in IR or UV we will not get any line right?
If it's not between 400 and 700 manometers in wavelength then the absorption will be difficult to see with the naked eye, and will require another means of detection.
awesome, really cool experiment
If you use table salt, will the results be the same?
While it's true that table salt contains sodium, dropping it into a Bunsen burner will not produce the same effect.
I would like to know the reason.
I expect that table salt would produce the same effect. However, table salt is not pure sodium chloride and it contains traces of other metals, such as calcium and magnesium, which are added as anti-caking additives. The video below clearly shows salt being added to the flame of a bunsen burner and the yellow emission spectrum of sodium is clearly seen. I would expect to see the same effect as shown in this video, but there might be additional absorption lines.
th-cam.com/video/Bh4hmlX9k7Q/w-d-xo.html
Here is another video, which clearly shows absorption from sodium chloride. Harvard's answer is wrong, but I do thank them for posting the video.
th-cam.com/video/Xnk6RoaOKM4/w-d-xo.html
Great job please upload more videos
Does this dark line define the location of the last energy level?
I'm pretty sure that it's an in between energy level. As in; we're showing the 'quantum leap'. Like the black lines occur because the electrons don't transition gradually from one shell to another... They just teleport. So if it's in the middle of the spectrum, it's an in between energy level.
Very cool!
Just want to know why helium line was first seen near sodium and what that means.
Wish these things have taught in school
Wow could u do same for water vapor ?
is there two prisms in that brass thing?
Correct.
That very light dark line has ruined many lives😭
Arjuna batch Wale like karo
great experiment
Brilliant!
thank u sir
perfect
Why do we need to heat Sodium to get those black line what if we just make vapors of Sodium and fill it in a glass Container and then just emitt white light and then get spectrum, the result should be this yellow color absorption spectrum
Thats amazing
Wow Amazing!
Thanks!
Great video!
It's awesome
That was cool
Ahhh, prolly don't need that much. In 1860 Kirchhoff and Bunsen noted the D lines in a spectroscope in one end of a room while a mere 3mg of sodium salt was combusted at the opposite side of the room! ....now you gotta clean all that shit outta your burner.
Really cool!
omg beautiful
It gives four line spectrum
Sir iska emissions wala bhi dikhao
YEAH AMAZING
My 11th chemistry topic 😂😂
Amazing. Just wow
i really wish i understood what was going on
It's not easy to explain in detail. Simply put, sodium vapor (by heating a sodium compound, in this case sodium bicarbonate) emits yellow light of a specific wavelength. That's why you see it glowing yellow. The same vapor absorbs yellow light of the same wavelength. That's why when you pass white light through the vapor and then through a prism where the white light splits into its constituent (rainbow) colors, you see a dark/black line in the yellow/orange region of the rainbow band. That dark line is the absence of that specific yellow which was earlier absorbed by the vapor .
The reason why the sodium vapor emits and absorbs light of the same wavelength (frequency) is due to the discrete energy levels of the electrons in the sodium atoms. Yellow photons are absorbed and emitted as the electrons move up and down the discrete energy levels. Any further explanation would be confusing and lengthy.
th-cam.com/video/eSMhVDQtPD4/w-d-xo.html
Basically; when you energize any element enough to stimulate electrons popping out of their stabilized orbits, it produces light/heat/energy; A spectrometer is basically hundreds of prisms per nanometer, and we're breaking up that light into a spectrum. You can tell the chemical makeup of a thing by it's 'spectra'. Which is how we first knew the Stars were made of the same stuff we have on earth! Pretty cool eh? Also, the black lines in a spectra reading show how energy levels are 'quantized', and the 'quantum leap'. But that's harder to fully explain. ✌
@@ShaneH good explanation..you finally cleared my confusion..thanks alot.
@@ShaneH which event occurs first? giving off yellow photon on being heated ? followed by absorption of yellow photon from the white light.
or both events occur at the same time..
?
1:16
Ok
Wow..
D lines
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