calculation of refractive index from absorption data
ฝัง
- เผยแพร่เมื่อ 5 ต.ค. 2024
- In this video, I will about the refractive index and its determination from UV-Visible absorption spectra. Refractive index it the measurement of how light propagates through a material. Higher the refractive index, slower will light travels through the material, that changes its direction. It is a very essential optical constant and plays an important role in designing optical devices.
It provides us information related to
1. Local field
2. Polarization
3. Phase velocity of light
#nanotutes
#nano
#tutes
#Refractive index
It doesn't look correct.
1. Why it is less than 1? The spped of light is higher that in vacuum in this material. Why. it has just normal absorption.
2. Why it has no imagine part? It based on absorption spectra, so it must have imagine part.
3. Possible it is calculation of imagine part of refractive index because of it based on absorption spectra. If yes explain it.
hello Sir, Your excel formula is wrong. PLease correct it. that 1/2 should be in the bracket.
Thanks for your suggestion.
I will check.
The calculation of the refractive index is not matching the formula. Something is wrong
How can The refractive index be less than 1?
send me the research paper containing the above formulas. Thanks
Thank you for your interesting review, but you made a mistake in the equation application of n. You should put 1/2 between quotation marks. The result will vary.
Thanks for your comment.
I will definitely check the point you have raised and will update it.
@@nanotutes you are welcome😊
I wish you can send me the paper of that equation.. my email yasamena92@gmail.com
Plz check your email.
Thank you so much. PLZ, could you share research paper from where we will get the relation of absorbance and transmittance? Thanks in advance.
Email ID plz
hello sir, I want to know the formula to which thickness or volume information is added.
I want to find out before and after curing of the solution, but the current formula yields a refractive index of 5 or more.
Here thickness of film or path length of cell is used
Thank you very much. But the calculated value of refractive index is lower than one how can possible it. Please reply sir
thanks for your video...., can you send me the paper illustrating the relation between the refractive index and Transmittance
Send your request at
nanotutes@gmail.com
Hello sir , sir have calculated the refractive index by using this method ,for my material it should be greater than one but it comes out less than one ,why this is ,will you plzz suggest me something about this
There would be issue with your data.
this in the real coefficient? or the imaginary?
is it correct for any thickness of film? can i do it for the same coating but with different thicknesses and expect having same values of RI? or just a trend?
Yes.
Thikness can be added
Thank you for your video. can you send me the paper illustrating the relation between the refractive index and Transmittance? is it applicable for thin films only?
Yes applicable.
Email address required.
Thank you very much for your video. I am wondering if I could use these formulas for my liquid sample (not thin film). If I put my sample solution into Spectrophotometer Quartz Cuvette having a thickness of 1cm, then can I also calculate the refractive index likewise you present here? or your procedure is only applicable for thin-film.
Sure you can do.
But soln should be uniform.
What is soln referring to?@@nanotutes
Thank you very much for the video, it has helped me with my project. I was wondering, if I may be so forward, to ask - if I have a plot of absorbance of a pollutant vs time, can I use this information to find the refractive index of my thin film nanotubes (doped titanium dioxide) or would I need specific spectroscopy results performed on the nanotubes themselves?
Sure, if you have absorbance vs wavelength plot, you can.
@@nanotutes thank you very much for your reply. Unfortunately the graph I have is the absorbance of Methyl Orange (AU at 462nm) vs time as it measures the decrease in absorbance of the pollutant overtime during the UV irradiation. I have spectroscopy of the UV emissions against light intensity but not against the absorbance. I do not know if any of this is useful. Thank you again
You need to measure abosrbance of you thin film at long range of wavelength not the for dye solution.
Actually you are going to calculate refractive index of you thin film not dye solution.
@@nanotutes thank you for your replies, it has helped me a lot
Can you please share research paper from where we will get the relation of absorbance and transmitance..
Email address plz
barnalipathak1@gmail.com
Plz check your email
Sorry I didnot get any mail
Plz recheck.
Can you pls send me the paper explaining the relation between RI and transmittance.
nanotutes@gmail.com
From where you got the relation between refractive index and percent transmittance ? Please share any published paper for above relation .
Email address plz
Thank you. My email id is
sridharparida123@gmail.com
Plz check your email
@@sridharparida8297 can you please send me the paper
Email address plz
Can you send me the related research papers
Could you please send the reference paper(article)
nanotutes@gmail.com
Please share me the paper showing the relation between RI and % transmission.
my email ID is r.bisauriya@gmail.com
Email ID plz
@@nanotutes r.bisauriya@gmail.com
Could you send me the reference paper (article)
Email ID plz
Tq
Could you pls send me the reference for this formula?
nanotutes@gmail.com
Will you please send me the paper sir
nanotutes@gmail.com
Please share me the paper or book showing the relation between refractive index n and transmittance T
Email ID plz