Experiments with the Bubble Model of Metal Structure 1952 - Sir Lawrence Bragg, W.M Lomer, J.F. Nye

Sir William Lawrence Bragg begins the film by describing the close packing structure of metals.
A demonstration goes on to show how bubbles on a surface of liquid can show the same structure as metals; this is a bubble raft experiment. The rest of the film, narrated by Bragg, uses bubbles to demonstrate the idea of dislocations in the structure of metals and how these occur at the points of greatest stress. The bubbles help to show how dislocations occur through rapid crystallisation and through collapse within a structure to create a hole. The bubble raft is further used to demonstrate how dislocations can correct themselves by pairing up or leaving a vacancy in a row within a structure. Crystal Boundaries are further described and demonstrated through the use of a bubble raft, showing how they might exist were two extremes meet. This can be were angles are or where disordered deformations occurs.
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[@jenohathazi920]

All respect for the wonderful and brilliant experimental presentation. Unfortunately, not many people appreciate the science of physics

[@petercarioscia9189]

In 1952, when this video was first made, scientists hadn't observed this effect in action yet. This was all theoretical until 1956. And it worked just as this video explains it, 4 years before the actual observation Science is amazing.

[@yaribsuarez8725]

Why haven't I seen this video before?, such a fantastic explanation!!!

[@florianrudowable]

This is pure gold. Thank you so much.

[@EddieVBlueIsland]

I think this is one of the movies mentioned in the Feynman lecture series. Dated but still fundamental, clear and accurate at least on the two dimensional hexagon pattern.

[@TeslaElonSpaceXFan]

Thank you! 😍

[@zuhairgasem5861]

Outstanding demonstration using old technique of bubble rafts.

[@valentinius62]

Just read about this in JD Watson's book The Double Helix, did a quick search et voila! Pretty cool.

[@AvramBlackmith98]

Fantastic explanation! Awesome!!!

[@DeaDSisko]

Here from the Feynman lectures!

[@hemantpanchal657]

Very beautifully explained. Thank you so much for this.

[@MegaMudrik]

very helpful to understand movement on the earth crustal deformation

[@dallarian8687]

Awesome content, thank you very much!

[@jerryk974]

Wow! I am impressed! Great video!

[@jaydenbrent1153]

Had to write a paper on this, used this as my source.

[@parimisreekar]

Such an awesome video....our modern 3D animations are not good at creating this impact of reality...

[@user-fw2ep5yb5c]

Good!

[@pandrea.perez.espitia]

¡Qué belleza!

[@keoganlarademusic918]

changed my life

[@_catonwner9204]

优雅而科学

[@ndavid42]

atomcsill! ⚛✨

[@miyaguitube]

genius

[@pyrrho314]

this is the shit!

[@jaydenwilson9522]

I love BUBBLES!!! I know I'm suppose to be wrong... BUT EVERYTHING IS JUST A BUBBLE!!! Big bubbles layering over smaller bubbles... those smaller bubbles are made of smaller bubbles.... over and over and over again.... is a bubble a sphere?? YES... but what happens when it cools or freezes?? How much pressure and surface tension would be needed for a bubble to change shape?? ALOT!!! Like Big Bang level stuff... maybe something the size of our sun could do it??? Not to mention sound waves are just bubbles too!!! Light isn't a bubble... photons aren't what they think. Philipp Lenard was right and wrong... light doesn't travel like a wave!!! All matter does!!! Energy??? Is that bound by inertia?? NOPE! But does the wave wobble or does the wobble wave?? Ring bubbles, sphere bubbles, wobbly bubbles, twisting bubbles, wavey bubbles.... bubbles bubbles bubbles!!!