Young's Double Slit Experiment - A Level Physics
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- เผยแพร่เมื่อ 3 ต.ค. 2024
- This video introduces and explains Young's double slit experiment for A Level Physics.
Everyone loves lasers in Physics. Young's double slit experiment uses the constructive interference and destructive interference of light from a laser to calculate and measure the wavelength of light. We need the separation of the slits, distance to the screen and separation of the light and dark fringes. You can do this practical without a laser as well.
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards:
AQA
CIE
Edexcel
Edexcel IAL
Eduqas
IB
OCR A
OCR B
WJEC
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What I learnt from this video: I'm not the only person who misspells "separation" all the time.
lmao
Eyy finally 😊
no worries, every day is a School day 😂
AQA use the letter 's' for slit separation, not the letter 'a' as in the video. The equation on the data sheet is w=(lambda x D)/s. Great stuff, well done!
Thank you very much sir,you helped me a lot,and now i really understand this topic
Do you guys read the comments? You only have to mention the miss spelling of separation once...
you're the best for real
If you count the distance between 10 peaks, that is 9 fringe spaces so you have to divide by 9 not 10
I'm so grateful for these videos - they've helped a lot!! (though you did spell separation incorrectly several times)
so wish i watched your videos when i learnt them in class to get it stuck in my head, got my exam this afternoon on this stuff -.-
danthebox You still have enough time. Good luck.
i did awful. never thought id say this, but i didn't do well because quantum did not come up at all. AT ALL :(
+danthebox What did you get in physics?
Your website has all the practicals required for year 12 practicals but this video is not included. Which one do recommend as better: this one or "Measuring wavelength of light with a Double slit" video
thanks it was really helpful
I think if that experiment would be replaced with a canon sand( not laser canon) would happen the same thing. It means : the experiment doesn't show anything because sand is particle, that( same thing ) would happen with all things as : sugar grain,salt grain, sand grain etc...( the photon doesn t interfere with itself but crashes with border of slit part (ricocheted the lips/borders of the slit )
Thanks for the videos by the way, very clear !
Thank you! Your explanation was very clear :)
What is the better way
tysm this helped a lot
Good explanation.
May I know the type of pen that you are using, it looks like a pilot. Could you give the actual brand. Thank you,
Check out this video here : th-cam.com/video/5599WQd9uUI/w-d-xo.html
Do we need to worry about the angle stuff in this topic? Like when you have sin x feta = lambda/a
Not sure how feta is related
Feta is nice on the salad or a nice sandwich.
for the experiment with the single slit and double slit how would the fringe pattern look?
Is a the actual distance of the gaps themselves (slits) or the distance between the two gaps (i.e. the part in the middle, which absorbs the waves)??
im pretty sure its the distance between the outer edges of the slits (i know its late but maybe others will find this helpful :) )
at 2.43 if you had ten fringes surely you divide the total distance by nine to calculate the distance between each fringe
Depends whether you measure from the (say) left of the first (on the left) to the right of the tenth, then a tenth is correct. If you measure from the centre to centre, then you are correct.
how can you calculate phase difference between the two light waves that meet on the screen?
where the two points are a light point and a dark point
I think u have to find the distance of each of the paths between the light source and the screen. The difference between these two is the path difference.
Phase difference is 2(Pi)*(Phase Difference)/Lambda
Good videos , . Like the way u simplify these videos. do u have videos covering electricity ? Thanks a lot
rodaabokor Electricity coming soon - keep checking back
Hi, I want to thank you for your amazing video they're really helping me understand and grasp concepts more effectively
I just have one question, in the CGP OCR book (pg 69 OCR A) it shows that when you put white light through a slit an inference pattern is still formed. I thought that only happens with a double slit?
Again I just wanted express my gratitude for your videos!
Thank you
Though it's been six years, I'll still try to answer your question. When we use white light, we add a single slit filter before adding double slits and the screen which is added to ensure that only one wavelength passes (Though white light has ranges of wavelengths, but the single slit acts like a filter). Hence why then eventually you get two coherent sources of light when it reaches the double slits, and you can then get interference pattern, once they hit the screen.
great video
Can I ask then is light a wave or a particle?
Sukhbir Sekhon it behaves as both and neither! Waves and particles are the models we can use to represent it.
Where could I get this little window with double slit?
Why do we diffract the laser twice (first with a single slit and then with two slits)?
To get coherent light (monochromatic) but with a laser you wouldn’t need two slits
is the intensity at dark fringe zero?
Yes it is
+A Level Physics Online but the light travels a different distance from each slit so shouldnt the amplitudes of light wave at a particular dark fringe be different based on the slit the light came from???
There will be a point where their amplitudes cancel each other out at a set distance even if they have travelled a different distance.
The most important thing ive learned is nobody's got a clue whats going on
What would be the affect on the pattern if the width of the narrow slit is reduced?
The central maximum will be much wider and less intense.
@@sarujan02thangavel93 erm what? Not sure about that
4 hours everyone, good luck
This is worse than the walking dead! Your ending cliffhangers are the worst!
do you know where the second part of the video can be found?
Separate * but good video
+Kairel Edwards I always spell that wrong!
When measuring the distance is that from the laser to the paper or slit to the paper?
I believe it's from the slit to the paper
You misspell the word "Separation" ...
Ericadolanxia I know
you misspelled separation
your voice is louder on the left than the right
what is the use of all this non sense in practical life. Let me tell you NONE
A level physics is not compulsory mate.