Thx sir i need this for my IA and this helped me out. I replicated the same experiment in my school and it was successful because of ur guidance, cheers!
@@resonancefeel yes sir I was investigating the effect of change in wavelength on the resistance induced by ldr so to do that I need to find the wavelength of some lasers which I used for my experiment
@@resonancefeel You are right. I am trying to make a double slit for the LASER but it is not working. I will also do the diffraction grating to make a video on interference. So, I will be making two more videos with my LASER. If you have any questions or suggestions of videos for me to make, please let me know.
In fact number of lines per inch will be given on the grating. From the LPI we are going to find the grating constant d, this is nothing but the distance between two lines or one inch devided by number of lines. If it is not given on the grating then we have to find it (distance between two lines). We need the travelling microscope or comparator microscope to find the distance. Thank you
@@rituraj123 The LPI (lines per inch) will be written on the grating itself. It will be written by manufacturer only. If it is not given by instrument supplier or manufacturer then we have to find LPI by using microscopes.
Yes, you are right but it depends on width of grating or number of lines per inch. 1 inch is 2.54 cm and N is number of line in one inch. Basically we calculate the width of one line d.
Hi there, There is no need of plotting the graph. Graph is only to mark the laser spots falling on screen. Even you can use a blank paper for spots marking. OR If you want to calculate the wavelength by plotting the graph only then one can plot the graph of "d sin(theta) Vs n" and find the slop which gives the wavelength.
Hi there, There is no need of plotting the graph. Graph is only to mark the laser spots falling on screen. Even you can use a blank paper for spots marking. OR If you want to calculate the wavelength by plotting the graph only then one can plot the graph of "d sin(theta) Vs n" and find the slop which gives the wavelength.
Only precaution you should take is "laser beam shouldnot enter your eye directly". Other thank that handle the grating carefully because it is made up of glass and it is costly (Rs 2000/-)
Yes. That depends on the grating. The lines per inch will be written on the grating, please check it. Then we have to devided one inch by number of lines
@@imramesh8694 Please go through this Quantum Mechanics video, if possible watch it completely or watch at 13 min. Dual nature of light has been explained Link is below th-cam.com/video/x4ujnMNj7W8/w-d-xo.html
Hi there, it is GaAs Semiconductor diode laser, it is very accurate, equipments required are very less such as laser, grating, screen, scale. Kindly go through video for complete procedure
Hello, If number of lines increases per inch or per cm means decrease in d value. We have Lambda = d sin theta/n If theta increases spacing between points on screen increases. Since d and theta are inversely proportional from above formula, "If d decreases (increase in lines) then spacing between points (theta) increases"
@@mahimapandey3680 it is very simple, You need a any laser source which is easily available in market. You can order diffraction grating online, available for around Rs.1500/- Any wooden screen and a scale or tape or a thread to measure the distance. That's it.
Hello there, It is very simple, to get it from trigonometry go through video at 5.30 minutes and sin theta in the tabular column watch video at 8.00 minutes. Thank you
@@reshmahittalamani6600 Yes no problem, you can take whatever distance you want. The thing is the laser spots on screan should be clearly visible and measurable. Normally between 80cm to 200cm we take.
Hellow, Respected sir i want to know how can we verify wavelength of 635nm rotary laser used in agriculture and construction sites can you please help!
Hi, We can perform the diffraction experiment and find the wavelength of any Laser. Now a days we have other techniques to find the wavelength easily by measuring the emission spectrum of the laser light. To measure emission spectrum we need expensive "spectrometer".
You can go through the following link for land leveling, rotavator & distance measurements. th-cam.com/video/SLWNqTnjWmc/w-d-xo.html For distance measurements th-cam.com/video/ck8hgxavkR4/w-d-xo.html
@@jinbaba1000able Hi, You can perform the experiment no problem. In your case distance between the points should be more. Normally more points will appear, centre point maxima and intensity diminishes centre to either sides. Distance between points is more because of following reason. If number of lines increases per inch (LPI) means decrease in d value. We have Lambda = d sin theta/n If theta increases spacing between points on screen increases. Since d and theta are inversely proportional from above formula, "If d decreases (increase in lines) then spacing between points (theta) increases"
Hi Sir, i have performed the experiment by using diffraction grating 15000 LPI, d=2.54/15000=1.693x10 raise to power -4, 1st right distance = 30.05 1st left distance 31.5 calculated value of Xm= 30.775 and calculated value of theta is =17.10 and finally calculated value of lamba = 2.895x10 raise to power minus 3. have i calculated correct ?
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Thank you so much sir tomorrow is my physic pratical exam ❤😍
Welcome
Mine also
Me also tomorrow ❤
mine tooo
@RP02045 My exam tomorrow
Thx sir i need this for my IA and this helped me out. I replicated the same experiment in my school and it was successful because of ur guidance, cheers!
So nice.
Thank you
@@resonancefeel yes sir I was investigating the effect of change in wavelength on the resistance induced by ldr so to do that I need to find the wavelength of some lasers which I used for my experiment
@@kani9212 Go ahead, All the best for all your research work.
@@kani9212 may be as wavelength decreases resistance also decreases, am I correct?
@@resonancefeel so basically when it comes to visible light it's proportional to a point but then after that it's inversely proportional
Excellent explanation, Thank u so much sir 🙂,,no tym wasted
Thank you
Thanks sir i didn't understood from lab teacher but u cleared it
Welcome, Thank you for watching.
You need to ask questions to your Sir also.
Nice....explanation, it's better to solve the formulas problems also in on screen....😇
you are Welcome. Thank you. I will try to solve some problems
@@resonancefeel yes sir
@@kps5570 yes, i will solve
Thank you sir,so much.
Thank you
This is like Thomas Young's experiment with the double slit and light.
Yes. But here instead of double slit, we take grating having many slits and diffraction takes place. In young's experiment interference takes place.
@@resonancefeel You are right. I am trying to make a double slit for the LASER but it is not working. I will also do the diffraction grating to make a video on interference. So, I will be making two more videos with my LASER. If you have any questions or suggestions of videos for me to make, please let me know.
@@frankreiserm.s.8039 Thank you, I watch your videos.
Nice description. Can I get the lab manual of this experiment? Thanks in advance.
Thank you
Thank you. I will attach manual in description.
Thank you ! sir, your explanation superb 👌....
You're most welcome
InstaBlaster
Thanks, Frank.
Thank you, Stay tuned for more videos
thank you sir ji
Welcome
sir how to find the line per inch LPI
In fact number of lines per inch will be given on the grating. From the LPI we are going to find the grating constant d, this is nothing but the distance between two lines or one inch devided by number of lines. If it is not given on the grating then we have to find it (distance between two lines). We need the travelling microscope or comparator microscope to find the distance.
Thank you
@@resonancefeel sorry sir i can't understand
@@rituraj123
The LPI (lines per inch) will be written on the grating itself. It will be written by manufacturer only.
If it is not given by instrument supplier or manufacturer then we have to find LPI by using microscopes.
@@resonancefeel OK thank you❤
Thank you sir much sir 😄
Thank you for watching
Very nice sir 👏👏
Can u share the kit name of this one !!
I would go share this with my students..
Thank you.
There is no kit as such, we have purchased the components separately. All the components are easily available in online / local market.
Sir i got 590 nm wavelength as a answer for this experiment is this value correct plz reply sir i used hene laser
Thank you so much sir its help me a lot
Welcome.
Is the formula of grating constant is -> d= 2.54/N.
????
Yes, you are right but it depends on width of grating or number of lines per inch. 1 inch is 2.54 cm and N is number of line in one inch. Basically we calculate the width of one line d.
Thank you
Welcome, stay tuned
But u didn't explain about how to plot a graph
Hi there,
There is no need of plotting the graph. Graph is only to mark the laser spots falling on screen. Even you can use a blank paper for spots marking.
OR
If you want to calculate the wavelength by plotting the graph only then one can plot the graph of "d sin(theta) Vs n" and find the slop which gives the wavelength.
@@resonancefeel but we have graph in this experiment our sir said graph is also important
Hi there,
There is no need of plotting the graph. Graph is only to mark the laser spots falling on screen. Even you can use a blank paper for spots marking.
OR
If you want to calculate the wavelength by plotting the graph only then one can plot the graph of "d sin(theta) Vs n" and find the slop which gives the wavelength.
Fine, no worries, you can plot graph as said in earlier reply. But both should give nearly equal answers
Thanking you sir
Welcome. Thank you for watching.
You were very clear enough thank you sir
Thank you Cathrine
super explanation sir
Thank you
Precautions??? And also thank you it was very helpful
Welcome Manish
What are the precautions that i need to follow to carry put this experiment
Only precaution you should take is "laser beam shouldnot enter your eye directly". Other thank that handle the grating carefully because it is made up of glass and it is costly (Rs 2000/-)
@@resonancefeel thank you very much sir
Thanks a lot Sir
Welcome
Expiriment or experiment sir??
Experiment
Op area damage
Sir helium neon laser ke alava
Humne
(Simple laser) red light laser use Kiya to chlega kya....means practical perform hoga ki nhi
Yes, it is possible. You can use simple laser available in market
Which I have used is also very simple diode laser.
Thx sir
Sir no. Of lines per inch on the grating 15,000 hoti h aapne 250 li hui h
So saari calculation galat ho rhi h
Plz reply
Yes. That depends on the grating. The lines per inch will be written on the grating, please check it.
Then we have to devided one inch by number of lines
Tillt grating to horizontal..and observe
The line Points will also tilt
@@resonancefeel how do we need to perceive light as wave!
Like a wave in 2D plane? Or 3D?
@@imramesh8694
Please go through this Quantum Mechanics video, if possible watch it completely or watch at 13 min. Dual nature of light has been explained
Link is below
th-cam.com/video/x4ujnMNj7W8/w-d-xo.html
Sir what kind questions may we expect from proffecor in viva on this topic or related to this
What is
Diffraction
Interference
Long form of LASER
What is wavelength of laser in this experiment
May be Principle of laser
etc
Thanks sir 🙏🙏🙏🙏🙏
My pleasure
Sir can you provide the lab manual please
Link for manual
drive.google.com/file/d/1hBpPh_eKCBqruQp3d_U3e-8ya4A35fY2/view?usp=sharing
@@resonancefeel thank you sir😇
Hello! Which laser are you using? What would you recommend to make this experiment, and have more or less accurate results?
Hi there, it is GaAs Semiconductor diode laser, it is very accurate, equipments required are very less such as laser, grating, screen, scale. Kindly go through video for complete procedure
Sir according to your values what will be the final wavelength ?? Pls tell sir for verification
It should be near to 630 nm. Please give me some time, I will provide exact value.
Sir what is the final answer
Sir agar grating me lines increase hogi, to number of spots increase hoge ya decrease?
Hello,
If number of lines increases per inch or per cm means decrease in d value.
We have Lambda = d sin theta/n
If theta increases spacing between points on screen increases.
Since d and theta are inversely proportional from above formula, "If d decreases (increase in lines) then spacing between points (theta) increases"
@@resonancefeel Thank you Sir
please share these book link sir
Please search in google, many books are available.
Sir can you please send procedure part of in pdf format
Sure
Following is the link
drive.google.com/file/d/1hBpPh_eKCBqruQp3d_U3e-8ya4A35fY2/view?usp=drivesdk
@@resonancefeel thank u sir
How to calculate sin?
Hi there,
Please post your question clearly.
You can calculate sin thethan by the value of thetha n that we finded by putting tangent inverse of xm/d
Sir, what is standard wavelength of diode laser??
It is 6300 A
@@resonancefeel Thank you Sir
Pls sir share starting to set up instrument
Can you please tell me clearly, what do you want.
@@resonancefeel pls share instrument kaise set krnge practical krne me ye puchna tha apse reading ka bra dijye kaise leny h
@@mahimapandey3680 it is very simple,
You need a any laser source which is easily available in market.
You can order diffraction grating online, available for around Rs.1500/-
Any wooden screen and a scale or tape or a thread to measure the distance.
That's it.
@@resonancefeel thnkyou sir
@@mahimapandey3680 welcome
Sr, could u plz explain with calculation
Can you please ask specific question
@@resonancefeelSir, your explanation was good, but brief calculation explaining was also needed 🙏🏻
Sir how can find sin thita in this experiment 🤔 please reply .
Hello there,
It is very simple, to get it from trigonometry go through video at 5.30 minutes and sin theta in the tabular column watch video at 8.00 minutes.
Thank you
Sir this is for gratting na
Yes, it is for Diffraction grating.
Mastt🔥
Thank you
What should be the distance between source and screen sir
Usually in college Lab experiments D = 80 cm and 100 cm distance between screen & grating can be taken. Two sets of readings has to be noted.
If it will be more than 100 cm
@@reshmahittalamani6600 Yes no problem, you can take whatever distance you want. The thing is the laser spots on screan should be clearly visible and measurable. Normally between 80cm to 200cm we take.
Thank u so much sir..for ur kind able reply..🙏🏻
Nice👍👍
Thanks for the visit
Hellow, Respected sir i want to know how can we verify wavelength of 635nm rotary laser used in agriculture and construction sites can you please help!
Hi,
We can perform the diffraction experiment and find the wavelength of any Laser.
Now a days we have other techniques to find the wavelength easily by measuring the emission spectrum of the laser light. To measure emission spectrum we need expensive "spectrometer".
You can go through the following link for land leveling, rotavator & distance measurements.
th-cam.com/video/SLWNqTnjWmc/w-d-xo.html
For distance measurements
th-cam.com/video/ck8hgxavkR4/w-d-xo.html
Sir, i am using 15,000 LPI diffraction grating it split the red laser light into 5 dots only, am i using the right one grating tool?
@@jinbaba1000able
Hi,
You can perform the experiment no problem. In your case distance between the points should be more. Normally more points will appear, centre point maxima and intensity diminishes centre to either sides.
Distance between points is more because of following reason.
If number of lines increases per inch (LPI) means decrease in d value.
We have Lambda = d sin theta/n
If theta increases spacing between points on screen increases.
Since d and theta are inversely proportional from above formula, "If d decreases (increase in lines) then spacing between points (theta) increases"
Hi Sir, i have performed the experiment by using diffraction grating 15000 LPI, d=2.54/15000=1.693x10 raise to power -4, 1st right distance = 30.05 1st left distance 31.5 calculated value of Xm= 30.775 and calculated value of theta is =17.10 and finally calculated value of lamba = 2.895x10 raise to power minus 3. have i calculated correct ?
Sir sin thetha ki value kaise aaygi ??
Kindly go through, it is simple trigonometry.
Thank you
Calculation Se😊
Comment below
Whom are parul its❤❤ 😂😂😂😊
Thank you for watching and liking
Or book writer name please
Please search for experimental physics books.
taking sin and all the value is so small
Can you please elaborate your question please. The question is not clear.
Thank you
Welcome