 So, so far we can find out that yes we can do this kind of interesting experiment with samples but can we do some practical experiments with that and the answer is yes you can do some practical experiment with the systems and for that we need to have a MOSBAR spectroscopy system that I can take anywhere and that was possible when a miniaturized portable MOSBAR spectroscopic system was developed which you can take it anywhere for your study all around the system and the short form is MIMOS. So, this is actually developed a few quite years back and this is actually a system that you can take everywhere with you and do an experiment on the spot and what was the different experiment you can do? So, so far we have discussing mostly about chemistry can we do archaeology and the answer is yes. So, what is the example of it? So, let me show you some example of it. So, this is an archaeological example of what people have done. So, most of you have learned that people living thousand years back they know how to create colors and from there they draw very beautiful pictures in the caves. So, these cave pictures and one such cave pictures was found in a place called Belo Horizonte in Brazil and over there these are the pictures people has found and they found very nice red color and not only that if you look very carefully you can find there are two different red colors one over here and one over here a little bit light and one little bit dark color and people have argued that those people living in the caves they know how to create two different red colors by changing the combination of the precursors and what precursors they used to create this red color? People have argued that they are actually using iron oxide different form of iron oxide epi 203, epi 304 which are the ores already found on the rocky parts on the earth surface and they know how to use it and they are using different samples of it to create those colors and people are arguing like no no no that might be possible that some of the color is actually washed off. So, then to resolve that people actually used mouse perspective scope and over there this instrument you are seeing this is the MIMOS. So, there you actually have this particular setup which actually put very close to that picture and over there you have the source the cobalt source we have and it bombard the gamma ray and the gamma ray is only affecting the iron. So, it is actually non-destructive phenomena. So, it is not cleaning or removing any of this drawing. So, it is affecting only a tiny bit of the iron present over there and what they found the data over there you can see they did the mouse bar spectroscopy in the dark color they did the mouse bar spectroscopy in the weak light color and they found they are actually came from the different precursors. So, the people living way back in the cave they are not as stupid as we try to think they are smart enough to create two different precursors and mix two different colors and create two different systems to draw different systems with red color. So, that is one of the unique thing people have found and another one example of this nice mouse bar spectroscopy can be found also for astrology I should say astro mineralogy. So, all of you know that a few years back we have sent this kind of Mars rovers or rover systems to move around the Mars. So, this is a picture it is a picture not taken upon the Mars because there is no one to take the selfie of this rovers over there. So, over there this Mars rovers actually sent and they actually equipped with this particular handheld smart instrument where they have a spectroscopy major a x-ray spectroscopy major abrasion tool and also a mouse bar spectroscopy. So, there is a miniature version of that mouse bar spectroscopy is fitted over there and over there there is a remote sensing instrument present over here which is actually have a camera and other instruments present over there which actually details where it can find some interesting sample and it triggers a signal to this mouse bar spectra instrument like okay record the spectra and they did record the spectra on the surface of the Mars and let us see how the results look like that is how the results looks like when they record it. So, this is from the camera how the signal looks like. So, the camera from here it is looking down and that is how it looks like and over there they look into one of the particular crater Martian surface Gusev crater recorded in 2004 and they measured three different iron samples present over here. So, that is the original data and the colored ones are the fitted ones and they figure it out what are the different iron samples you have just imagine you are sitting on the earth and thousands of miles away on the Mars you can detect what are the different iron oxidation state present in the Mars rock and over here it took three hour 25 minutes for this whole measurement in actual reality the actual measurement is actually quite fast in reality when you do the mouse bar spectroscopy in general it takes less than half an hour. So, why it took three hour and 25 minutes that is because mouse bar spectroscopy should help also have this cobalt system right the cobalt 57 system and where it sorry the cobalt precursor system which actually we already discussed about have a lifetime of 270 days and sending the Mars rover packing it over on the earth sending it through the rocket putting it on the Mars takes time and over here a lot of cobalt precursor is actually already lost so that is why the cobalt precursor concentration goes low so that is why we have to do the experiment multiple times to get a very good data that we can actually rely upon so that is why it takes more time but still what it says that mouse bar spectroscopy can be very useful not only to find what is happening around your complex but also some complex thousand years back from this kind of caves and also thousand miles away in other planets to figure it out what are the different iron centers are present over there with that we would like to conclude this particular discussion over iron mouse bar spectroscopy there are other spectroscopy possible for team and platinum I will add them some of the graphs that you can follow later on and find it out how different systems with platinum and team we can also do some mouse bar spectroscopy now any questions or queries up to this point please no sir yes sir in that case that the seventh example 3 Fe 4 is ferrodoxene the actual iron state is 2.5 so how this is actually accounted means the obsidian state is 3 and it's not 3 and is not also 2 that is accounted by mouse bar but is there any antiferro coupling or something means how 2.5 is counted yes so over here the this particular state yes the 2.5 so mouse bar spectroscopy already provided enough information that it is somewhere in between because of this particular values which is lying in between 2 and 3 and people have also done magnetic studies and over there you can calculate the magnetic coupling values from the magnetic studies and over there you can also find out what is the oxidation state whether it is 2 or 3 or 2.5 depending on the coupling you can find it out very similar to the coupling of JJ coupling you monitored in the NMR similarly magnetic coupling can be also measured out okay and from that values you can find out whether it is 2.5 or 2 or 3 sir we can use photoelectron spectroscopy here yeah you can do photoelectron spectroscopy here yes thank you but the thing is that photoelectron spectroscopy mostly work on the surface samples because it doesn't penetrate through a lot whereas mouse bar because it's gamma ray you can get that idea of what is happening also not only the surface but also what is happening inside the sample so you get a very better average picture what is happening about the system okay sir thank you sir so one question from Rishabh how to measure the delta value looking at the spectrum and how to find out which signal belongs to the isomership for an example let me take the example of this data let me go over here and let me take this particular data over here so what actually first we do we take the original data so we take this particular data over here okay so that is how the data looks like and you can see there are multiple curves over there so first we actually deconvolve with that we fit the data with different data to figure it out which one is going to work together give me this data and what they are actually finding look into that carefully the blue data one over here and one over here so this is the blue data then there is a red data one over here one over here and then there is a green data one over here one over here now once you have these three particular data if I draw it separately that will be easier for you to understand this is the blue data so from there what you do average it out that will be the delta value this will be the delta eq value for the red data red data is a little bit close by so take the average whatever it is that will be the delta value this will be the delta eq value for the green data green data is somewhere like this so this will be the delta value and this will be the delta eq value okay so first we take the overall data, deconvaluate it in different data points. And from there, you can find the delta value, delta value value. From there, you can get an idea what is their oxidation state, their spin state, and also from the, actually, this is actually put in the absorbance rather than the transmittance just on the opposite side. But from their absolute intensity, you can also find an idea what is their ratio, how much is actually present over there in a sum. Does it answer your question, Mr.