Diffraction Demo: Single Slit and Circular Aperture

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.

[AdityaVenkatesh]

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

[deploy_leroy]

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

[partozohrabi]

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

[jashan_iitroorkee]

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

[milikumari]

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

[shifamuhammad]

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

[vinodsingh]

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

[sejalvinodwasule]

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

[devanaidu]

I am commenting because YouTube needs it to be recommended

[Mokun]

Thank you so much for the demonstration sir!

[ambujmishra]

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

[HassaanFareed]

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

[Random_Things_On_Youtube]

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

[maycodes]

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

[Rex]

Sir what is the dia of circular aperture ?

[odal]

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!

[seanchu]

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

[martinsoos]

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?

[arghyadas]

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.

[anushabenny]

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