Diffraction Demo: Single Slit and Circular Aperture

Рет қаралды 81,649

6 жыл бұрын

This is a demonstration of the diffraction pattern produced by a single slit, with slit widths of 0.02 mm, 0.04 mm, 0.08 mm, 0.16 mm producing more and more closely spaced fringes. Also shown are patterns for circular apertures of 0.2 mm and 0.4 mm.
This demonstration was created at Utah State University by Professor Boyd F. Edwards, assisted by James Coburn (demonstration specialist), David Evans (videography), and Rebecca Whitney (closed captions), with support from Jan Sojka, Physics Department Head, and Robert Wagner, Executive Vice Provost and Dean of Academic and Instructional Services.

Пікірлер: 78

@AdityaVenkatesh101 4 жыл бұрын

Excellent video...finally understood what my textbook was talking about...So good thank you very much!

@shivamsingh-wn2bu 2 жыл бұрын

help me

@onlystudynodistractions8215 2 жыл бұрын

@@shivamsingh-wn2bu what happened

@deploy_leroy 3 жыл бұрын

In a few years this will be in everyone's recommendations. Great Video !

@partozohrabi1327 2 жыл бұрын

U cannot possibly imagine how long I've been searching to understand this, thank u so very much.

@shifamuhammad7366 6 жыл бұрын

You, sir, are a saint! Your demonstrations are so helpful!!!! Thank you so much!

@jashan_iitroorkee 3 жыл бұрын

It is the same as our Physics teacher made us visualize during the class. Thanks for this beautiful video. Love from India !!

@vinodsingh2946 3 жыл бұрын

After four to five videos..which are not able to convince me.... Finally I got this one..... Thank a lot for clearing concept by this experiment

@milikumari5474 3 жыл бұрын

Thanks a lot sir.. Your demos add so much significance to the texts we read..

@Mokun413 3 жыл бұрын

Thank you so much for the demonstration sir!

@chanchalkumarahuja 6 жыл бұрын

Very nicely demonstrated

@Viveknannuri 4 жыл бұрын

thanks for the demonstration

@ht-ve9fe 2 жыл бұрын

Thank you Dr. Edwards.

@ambujmishra1157 6 жыл бұрын

Great demonstration sir, I never knew before that how does it looks like.. awesome

@appledinger1121 Ай бұрын

Simply Excellent

@sejalvinodwasule8868 4 жыл бұрын

Wow this is so beautiful!studied it but was never able to visualize

@JAGGU11 3 жыл бұрын

Yeah 😂😂

@era7539 4 жыл бұрын

thank you!

@karimyounan5999 5 жыл бұрын

great .... helped me a lot thanks

@devanaidu8743 3 жыл бұрын

I am commenting because KZfaq needs it to be recommended

@maycodes 4 жыл бұрын

I wish I had seen this before in school, At university I was amazed to see Newton Rings.

@kricketflyd111 Жыл бұрын

Thanks for the round one😁

@ameerhamza4816 5 жыл бұрын

This need more views

@JAGGU11 3 жыл бұрын

Integration

@chandreshkumar2450 3 жыл бұрын

@@JAGGU11 i want his profile pic

@Random_Things_On_Youtube 3 жыл бұрын

Thanku sir from india very helpful in visualising diffraction ❤️ very helpful 🙏

@tssdancelove3319 3 жыл бұрын

very nice...thank u for this video

@dhananjaytiwari7124 3 жыл бұрын

Thank you sir it helped me much

@peacefulcat3578 4 жыл бұрын

thank you sir

@jebaaniqa3382 3 жыл бұрын

Thank you sir 😊

@nileshpandey4468 3 жыл бұрын

So much helpful

@kimtaehyungthekingofheart5978 3 жыл бұрын

Sir thank you so much 👍👌👌👌

@SATYALIFESTYLESTUDIOS 3 жыл бұрын

Very nice video 📹

@martinsoos 3 жыл бұрын

I liked the bounce of the round aperture. The center moved first and the outside moved in a wave function. Was that from the aperture turning away from perpendicular?

@Oyee_Pranjal 3 жыл бұрын

Thanks sir ......🥰

@GajananSR 3 жыл бұрын

Sometimes recommendations Rock🤘

@Differendramovies 4 жыл бұрын

Wow

@HassaanFareed 3 жыл бұрын

Sir where to get such a perfect slits?? Any link?

@assassinx2550 3 жыл бұрын

I think u can get that on eBay

@cm-a-jivheshchoudhari9418 3 жыл бұрын

Make 1 at home

@Rex2464 2 жыл бұрын

Sir what is the dia of circular aperture ?

@odal6770 Жыл бұрын

At 0:56 your hand is right in the path of what should be the part of the beam creating the corresponding reflections, and still, it remains untouched by the beam! No light rays are reaching the screen, except at the center!

@MikkoRantalainen 9 ай бұрын

There are no reflections. And the diffraction happens at the slit, not later. I think the Pilot wave theory provides a better explanation for this experiment. If you're not familiar with the Pilot wave theory, try the Veritasium video titled "Is This What Quantum Mechanics Looks Like?" And note that since all we're seeing around 0:56 in this video is a line so we cannot know if the camera is higher or lower than the plane of the light.

@odal6770 9 ай бұрын

@@MikkoRantalainen Interesting, but I must admit that I still have some reservations. One can deduce the height of the light source by the changes on the screen. Besides, the presenter stands next to it at the start of the video. Concerning the lack of reflections and the diffraction starting at the slit, I wonder what you mean exactly. In my layman's view, either the reflections are created when rays/waves hit the screen, or they can be created at a distance, without any rays/waves touching the screen at the corresponding locations. The latter case is very strange, and i have no satisfactory explanation for it. Of course, if the light rays/waves are reaching the screen at the locations of the different reflections, then the mystery is solved. Concerning your reference to quantum theory, I would much prefer a down to earth explanation. Do you have one?

@seanchu3962 4 ай бұрын

The experiment setup is not very clear. How was the experiment setup constructed?

@arghyadas6978 3 жыл бұрын

I tried doing this with a divider and using my phone flashlight. I made two holes using a divider one mm apart on an opaque surface. I could only see the circular diffraction pattern. My original intention was to recreate the double slit but I failed to do that. My holes were too big.

@asinjobi6853 3 жыл бұрын

Dude u should use a monochromatic light source not the white light

@ankitasrivastava3966 3 жыл бұрын

@@asinjobi6853 exactly

@assassinx2550 3 жыл бұрын

@@asinjobi6853 I think he can do so by taking a candle and sprinkle some table salt on it

@adarsh3058 2 жыл бұрын

Now I see where the picture came from

@anushabenny8586 3 жыл бұрын

Why does it have rings when it passes through a circular aperature? Does it interfere with anything like in the slit experiment?

@arghyadas6978 3 жыл бұрын

It's a diffraction pattern, not an interference pattern. They just show the circular wavefront of the light in this case.

@anushabenny8586 3 жыл бұрын

@@arghyadas6978 what's circular wavefront?

@arghyadas6978 3 жыл бұрын

A wavefront is a plane where the particles of the wave are vibrating in the same phase. When this plane is circular in shape, it's called a circular wavefront. Same phase here means nature of movement.

@arghyadas6978 3 жыл бұрын

Umm actually, it won't be 'circular wavefront'. It would be a 'spherical wavefront' as the wave propagates in three dimensions.

@priyanshgupta488 3 жыл бұрын

@@arghyadas6978 Yeah.. Circular wavefront doesn't make sense here

@odal6770 Жыл бұрын

You get the same circular pattern if you point a laser pen onto a mirror. No slit needed.

@chibuzordesmond3937 Жыл бұрын

Is it a single slit or two slits?

@noorfalak6341 3 жыл бұрын

Wao

@edwardlewis1963 3 жыл бұрын

@2:55 ..... ok I now notice your correction added visually. Anyway, how can these small slits/apertures be made? You are obviously using some sophisticated device but what assurance does the spectator have that you are not just flashing pictures up and telling a made up story? There's a lot of fluff on youtube about Young's Double Slit experiment, but a double slit interference pattern isn't surprising if a single slit produces a pattern. Puzzling over the double slit result without understanding the single slit result is..... odd.

@kingofblox2976 3 жыл бұрын

Lol, read a textbook

@Upendra237 2 жыл бұрын

OMG

@danielalarge728 3 жыл бұрын

@adarshsingh269 3 жыл бұрын

Billgates in screen..

@sassoahmed9734 2 жыл бұрын

تم الاشتراك ولكن أرجو ترجمة فيديوهاتك للغة العربية الفصحة

@greetingsearthlingsmynamei6393 3 жыл бұрын

Light is an alternating current. It's obvious when pointed through the round hole. Light hits the screen, reflects back to the hole, back to the screen but more diffuse,..... rinse and repeat. Make sure you use a non reflective surface on the back side of your slit. Your experiment is similar to looking in a mirror pointed back at a mirror. Are there really 50 of you leaning one direction or the other? No, it's all reflections and your controlling them.