Simple double slit experiment at home
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- Опубликовано: 7 окт 2024
- This is the most simple double slit experiment that you can easily do at home with materials most people would already have.
The experiment shows that light can travel as a wave due to the interference pattern shown after a concentrated beam of light passes through a narrow double slit.
It is not double slot experiment but diffraction experiment, double slit experiment uses one photon at a time.
Thank You! As an infographist I had to illustrate the doubleslitsexperiment a few times. Someday I realzed, that I the sources for my graphics actually were existing infographics. Those showed no actual sizes of the experiments.
Thank you, brief and to the point.
Good job sir that makes me more clear ❤️
The perfect YDSE illustrated by you....and best on RUclips.you succeeded in obtaining the fringes and their intensities were also uniform.....
Next time make a video on ydse with white light and obtain coloured fringes.
Best wishes from India.
Thanks for the compliment and advice mate. I'll give the white light a try next time 👍
@@no81e yo what laser did you use
Best explanation in least time
😊
How do u cut two slits so close on paper? It just tears apart (the paper between slits)
Use better paper and sharper blade. Maybe on top of a stack of paper.
Okay. How do we prove it’s a particle this simply?
This proves it’s a wave. The photo electric effect proves its particle nature
Why dont you google that question
Well, To do that we need more sophisticated Equipments. To do ghat we need to send single electron and do the experiment
It's not a particle, it's not a wave either. It's either both (somehow) or it's its own thing! We need to do more work on this before we find out exactly how it works
From where you purchased this laser
Please put the link in description
Only God knows from where I guess.
@@yasyasmarangoz3577 देर आए दुरुस्त आए
I actually bought the laser from a regular variety store. I'm not sure where you live, but most readily available laser lights, online or in a store, should be OK.
wait isnt it single slit one?in my class we have not done this far but i know only the double slit one but this ones observations seem to be same though.anyways thanks
So cool thanks a lot
Can you explain how you cut the slits into the index card?
Hey Stephen, it was simply by using the razor blade to slice two cuts as close together as possible. The slits were probably half a millimetre apart, and 5mm long. I was also using normal printing paper.
I should do a video showing the set-up process as I've been asked a few questions about it now.
Thanks for your question.
So cool.
They say when light is observed, it becomes two lines!! But i see here a million lines
@@karlmcaidey1084 when you detect which slit the individual light photon passes through, light will change from a wave to a particle and show the two lines you mentioned. As this experiment does not detect which slit the light passes through, it's showing a wave interference pattern.
I hope that helps 👌
Why does it only show the multiple lines?
proof that light has a wave nature
wow really indepth!
Vertical or horizontal slits?
The interference pattern was vertical so the slots must have been cut horizontal in the paper.
@@no81e Could you explain this behaviour? Why when cut pattern is horizontal the wall pattern is vertical?
@@ernestamoore4385 When there are two vertical slits the wave will be split in two waves next to each other. When there are two horizontal slits the two waves will not left and right, but up and down. So if you pull a left and a right slit apart from each other, there will be a horizontal line. If you pull a lower and upper slit apart, it will be a vertical line.
@@no81e but you can see on his hand when he was close that the slits were cut vertically. So why would the interference pattern also be vertical!?
My first double slit experiment was, when my girlfriend invited another lady to our home...
What you are showing to us are light defractions. In a real double slit experiment, the width of the slits must be very, very small (not much greater than the wavelenght of the light itself). The wavelenght of green light is about 0.0005 millimeters. To produce such thin slits, you will need special equipment.
(I did your experiment myself years ago at home in a similar way and was quite disappointed to learn that my observations were just light defractions.)
What object people use to observed that the photon choose one of two path?
@@alexandrugalan5 "Semiconductor detectors, photomultipliers, CCDs, or superconducting nanowire detectors are often used, as they provide the necessary sensitivity and size to be utilized in such an experiment." (GPT 4)
Can we do this setup But instead of normal YDSE we do the one where the results was different based on if the experiment was observed or measered. Causing The interference pattern to not be present.
Based on what I've seen from variations of this experiment, if you observe which slit the light is going through, then yes, the interference pattern should collapse to a particle based pattern, ie., two lines of light.
@@no81e can u elaborate on the "observe" part what tools would eliminate the interference pattern.
I am certainly no expert on taking this experiment to the next level. However, I've only ever seen the light detected with highly sensitive equipment in controlled lab conditions. I'm not sure if this can be done at home. I'd like to hear if you find out how.
@@no81e so far, my research leads to introducing a photodetector near the slits to disturb the wave function resulting in the collapse of the interference pattern. Only the question remains is how exactly would i assemble such a setup.
So if someone looks at the paper while you are looking at the wall this pattern will be gone?
Haha, not quite. The experiment needs be able to detect which slit the individual light particles pass through and that can't be done with the naked eye.
What makes this so strange
This experiment shows a wave interference pattern on the wall proving light travels as a wave. This isn't so strang on its own, but when the light is detected before or after it passes through the slit makes the light pattern on the wall change to a particle interference pattern rather than a wave pattern. This means light can travel both as a wave or particle depending on if you determine its location as it travels through the slit. That's the strange part. There are plenty of RUclips videos that explain it better than me if you want to see more.
Who came from until then 😂😂
How do you have a wave without a medium 😭
The medium is the aether. Light is a modality of the dielectric force within that aether. Matter is another modality, essentially extremely high energy light. Think of liquid, solid, and gas as the modalities of water, as an analogy. Gamma rays are light that is almost matter (and sometimes acts as matter). Hydrogen is the base form of stable matter, and every other element is essentially a combination of hydrogens. Once you understand the basics of everything being just a complex ocean of electromagnetic frequencies within the aether, material physics really starts to make sense. Material is a holographic perception (by our consciousness) of these forces, and modern popular physics is stuck on an archaic understanding involving particles, which are simply point-descriptions of fields, and not actual, solid, indivisible units of reality. The perception of materialistic particles make narrow concepts more understandable, but cause a complete miss on the bigger picture. Tesla knew this stuff, and elites in gov't stole all his writings so that they could benefit from the uncommon knowledge and application of advanced tech. Frequency, waves, and vibration, are better descriptors. You're mind will really be blown when you find out that even these "waves" are actually more-so probabilities being actualized than they are physical. Meta-physics is more real than actual physics. Then you start talking "spiritual," which personifies this higher-dimensional realm of existence into analogical human terms, since there is no other way we can actually understand it. The universe is basically dimensionally vibrating fractal energy that all began from one highly intentional vibration, caused by the non-temporal infinite conscious prime mover. His "word," you could say (as the Bible states it). God's creation sure is mind-blowing.
@@TheSpecterRanger Its even more mind blowing if you realize that light does not need aether, as it is both a wave and a particle. Aether is a misconception.
@@AndrewWang. True, when speaking about our realm, but "aether" is a description of a higher dimension "substrate." It's essentially metaphoric language to help describe and conceptualize (similar to how "atom" was adopted and is used in the past, even though not correct). We are very finite creatures and will never be able to know or understand the totality of reality, we can only understand the parts most proximal to us, and only to a small degree. Thinking we do know or can ever know all is pure ignorance. I'd leave that task to God. We're just here living in it, and getting the wonderful gift of being able to experience our little pocket of reality just as God intended for us. No need to seek beyond our capabilities. His handiwork sure is amazing though the more you study it closely; It all points to Him.
@@TheSpecterRanger This is the god of the gaps problem. I am fine with it but I think that humans should also find the edge of our capabilities, not just assume them. Sometime we will have a problem we work on for more than a century, and if we can't solve it then there, we reached the end.
@Wang. I disagree with the claim that it's "gods of the gaps," which assumes it is used as an unreasonable conclusion to an open ended question. I agree that we should strive, and that there is an edge to our capabilities, but many would disagree and say we are limitless, which is why I clarify the need to recognize our limits. That mentality of hubris quickly becomes self-worship and self-deluded pride. "God" is the consciousness that is, was, and forever will be, that which exists outside of time and space. For something (everything; time and space) to have come from nothing, it is only logical that a conscious prime mover had to make a decision for that to happen. From a position above and beyond our universe. Any idea that everything can spontaneously begin existing from absolutely nothing is antilogical, and is a "god of the gaps" theory itself, stemming from an anti-God sentiment. Only through humility can reason be used to it's full extent, otherwise our personal biases create our conclusions. I was an atheist when I reasoned that a God made sense, and when I had a personal encounter; when I finally denied my greatness and recognized my frailty of mind and spirit. He (we use personification because it better represents our relationship with the Creator) is very real and permeates all things. This consciousness (God) knows everything you know and has felt everything you feel; He knows everything about you, and far more about you than even you do (He knows all there is to know). The amazing part of God is that He is gracious enough to actually come meet us at our level, and guide us on our journey through life, so long that we reach out for the Truth and search for Him. He truly is a Good and Loving Creator. God bless you brother, I hope you encounter Jesus and discover his immense love and peace for you. I thought it was all imaginary nonsense for many years, but He revealed Himself to me in a way I can never deny, and I am eternally grateful to Him for showing me the truth after so many long years of searching. ---- Matthew 7:7 "Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you" ---- John 18:37 "To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth. Every one that is of the truth heareth my voice." ---- John 8:32 "And ye shall know the truth, and the truth shall make you free."
where's the double slit?
Two small horizontal slits were cut into the paper with the rasor blade shown in the video. I tried to cut the slits as close together as possible and they're probably about 1mm apart.
I also darkened the paper with a black marker to try and stop the light passing through the paper itself.
I hope this all makes sense.
What kind of laser is it
Bird scaring laser. About £8.
I sort glass. It's my job
It's one slit experiment😅
Really, most people would already have laser of that size just sitting around? Maybe it would be helpful if you would say exactly what kind of laser it is (or link it).
1. Go to google
2. Type "green laser"
There is no 3
So the light wave behaves as a wave? Isnt that just common sense? Its in the name
Yes, thanks to this experiment we know that light travels as a wave. No big deal, right! However, variations of this experiment show that light can change to travel as a particle and not a wave. That's the interesting part.
@@no81e I'm trying to find a video where it behaves like a particle and I can't find anywhere, any help?
But when a detector is placed the interference pattern collapses
The video recorder and the light source are using the same electricity power source probably.
Thus the light source and recorder are sharing a same informationcommunication channel (the electricity source).
Try to use a charged battery powered recorder, this cuts off the information communication channel between the light source and video recorder.
Better still, if the light source are also using its own charged self powered different battery source.
Ehm, this is NOT what a real double slit experiment is. Its just a light refraction. Shame on you.
Does it not show that light travels as a wave?
And why would you put shame someone for attempting science experiments at home and sharing their findings. That sort of thing is typically not what the scientific community is about.
@@no81egood!
@@no81eyou click baited us for money... THIS is not what the RUclips community is about.
Either show the double slit experiment or remove it from the title click baiter.
@@KingJames-go8pq I did a science experiment at home and shared my findings with others online to help them give it a try; I don't think there's anything wrong with that.
And I've never received a cent from RUclips so it definitely wasn't for the money. You need a lot of followers and views to monetise your videos and that's not happening.
Have a good day 😊
Does it matter if my laser is red
No, I don't think so. As long as it is a focused beam of light (laser), it will work the same 👌