the best lecture I have seen so far on the subject. I really appreciate it.
@Romeo-sf7tw3 жыл бұрын
Way better than what I actually pay for!
@travisjefferds1417 жыл бұрын
I didn't understand how a spectrum was created from this for the longest time. this is such a satisfying relief to finally understand. Thank You!
@markomeza911 Жыл бұрын
Excellent explanation. Combined with the Fourier transform description, lectures clarified how the FTIR works. Thank you.
@lattakiantiger10 жыл бұрын
Thanks for this great explanation. American professors are the best in making complicated things very simple.
@NoTorr20008 жыл бұрын
Would you believe that I have been repairing FTIR's for 15 years and this is the first time I have had a truly clear idea of exactly HOW it used the interferogram? Thank you
@nvd-1325 Жыл бұрын
oh sir, can you give me some repairing documents of FTIR, i'm frrom Viet Nam, so many thanks you so much
@mrbbizzle3 жыл бұрын
Hands down the best description of the interferometer I've come across. Thank you for the great presentation and discussion on sources with multiple wavelengths!
@user-eu5iw2mu3p6 жыл бұрын
This is the best tutorial in FTIR, very useful in electronic engineering and physics
@ChemDaddy137 жыл бұрын
I really liked the way it was presented. Jokes, info, and well paced.
@pessi02118 жыл бұрын
One of the best lectures on FTIR! Way better than textbooks. Thanks a lot!
@hadekpm9 жыл бұрын
This is a great video video with very clear explanations. I could not find any text about FTIR online that described all of the fundamental aspects together in the same place. Thank you!
@BuK-HumMraanG4 жыл бұрын
So cool, This Video is the one of so clear lectures in KZbin
@andresprietomuriel11 Жыл бұрын
Thanks a lot!, I was looking for a clear and precise explanation like this
@mayurakrishnar84283 жыл бұрын
THE BEST explaination ,thankyou
@ahrentrevino99813 жыл бұрын
Excellent explanation. Much appreciated.
@Diputs09148 жыл бұрын
what a wonderful lecture. i think it can make understand even a child. i'm so jealous of your student, because my professor doesn't care about student's understanding.
@keynotechem6 жыл бұрын
I have made the slides for this presentation available as a PDF document at the website that supports this channel: KeynoteChemistry.com. Go to keynotechemistry.com/presentations#Post3 to get the slides and follow along. Thank you everyone for all your comments.
@tanujkumar15763 жыл бұрын
The fact that this was made before the first GWs were "seen" with interferometers OMG
@piotrekjazz12877 жыл бұрын
Thank's Man, that was a very very good one, compared with the res of the content in the internet. You make the science earth turning!!!
@morninglight259 жыл бұрын
Very clear explanation of the theories behind FTIR. Thank you :)
@barrybai51234 жыл бұрын
Very Helpful Presentation. Thanks sir!
@Vid_ml4 жыл бұрын
31:30 bam, they confirmed it years later:) spacetime moved.! What a time to be alive, we even knew the direction and pointed our telescopes there:)
@kylelambert46205 жыл бұрын
This video is excellent, thank you!
@b.physicist-photonic12017 жыл бұрын
Very nice. Thank you!
@zack_1203 жыл бұрын
marvelous !
@puresexcellence9 жыл бұрын
Hey, I want you to know that that was an amazing lecture. Thank you!!
@raymondzhao95573 жыл бұрын
really good lecture!
@chenxi3317 жыл бұрын
Very good, thank you very much
@ismailsarwar7333 жыл бұрын
Hello, Thank you for the great video.. I have a question, at 8:20 when you slide backward the moving mirror then how did the coming back (left) signal cancelled down from the moving mirror? Shouldn't it be cancelled at the other end of the splitter?
@Karelmeester4 жыл бұрын
Ok dumb question; When the moving mirror is at a distance where there is maximum destructive interference, so no light is directed at the detector, where does the beam go to? Is everything reflected back to the source then?
@keynotechem4 жыл бұрын
The power does not go away. When we have perfect destructive interference we have a situation where 1+(-1)=0 and when we have constructive interference we have 1+(+1)=2. In one case we have the minimum signal and in the other the maximum. The two beams are still moving to the detector but if the cancel each other out we will observe no power.
@NoTorr20005 жыл бұрын
I often give training to customers on the use of my companies Multigas FTIR (MKS 2030) and I like to show them this video as you do so much better at explaining this in an understandable and entertaining fashion than I am capable of doing. The problem is, sometimes I don't have internet available when giving these classes and frankly I am concerned that at some point the video may become unavailable in the future. Is there any chance I can get a copy of this video if I promise to include credit to you and links to your youtube channel?
@sadeghi73 Жыл бұрын
excellent
@suryanarayanmondal36388 жыл бұрын
I want to make a simple test setup of FTIR on a optical bench for the range of 2-14um for gas. We have all the mounts in our lab. I found all the items (i.e. beamsplitter, mirrors, windows for sample chamber, 16bit ADC) except the sensor. Please tell me the Model of a sensor which can be used (tried) on this setup.
@simonneil83059 жыл бұрын
This is an excellent run down of interferometry in FTIR, thank you so much. Your diagram at 29:10 perfectly captures what I want to express in an essay on FTIR. May I use a screenshot of it, and if so, how should I reference you?
@markd31315 жыл бұрын
Great videos! They're really helpful but I have a question. Does this work any differently if the light source isn't coherent? In your example, all the waves are have a maximum at the same point but is that different from the light you get from a lamp?
@keynotechem5 жыл бұрын
The final signal is a total power signal. No matter what phase the individual photons are start in they will meet again at the second beam splitter an recombine with a power that depends on the different distance they travelled. I am no physicist but I believe that, since every possible phase is represented in the light source, the problems due to different phases will all cancel out for the total power signal at the photomultiplier. For more precise distance measurements you would need a coherent laser (and a laser is used to measure the distance the mirror moves, that is why you see a red laser beam in an FTIR instrument). For measuring the wavelengths contained in the signal the phase shouldn't matter.
@suryanarayanmondal36388 жыл бұрын
What happens when you add different weight to the components instead of keeping all at unity.