Iodine Clock (slow motion) - Periodic Table of Videos

Explained by Professor Martyn Poliakoff. Also featuring Dr Samantha Tang.

Brady's other channels include:

[ruffus]

Can we take a second to savor the image of the Professor putting on chemical magic shows for kids?

[kingofalldoughboys]

I absolutely love Sam's reaction to this experiment at around the five minute mark! I can't make out what she's saying but it's adorable nonetheless! 😊💜

[murdocha]

I love the Lab assistant's reaction to the slow motion video and then Destin's reaction to HER reaction. 
Science, as always, is cool. 

[MissLexiMarie]

I've found my absolute favorite reactions of all time. The color change, and Sam's childlike wonder at the slow motion footage. I can't stop rewatching it!

[renderedtoscale]

Dr. Tang's excitement on seeing the slow mo of the reaction reminded me of the intro to these vids when Destin was so excited to meet Professor Poliakoff that he was giggling hysterically.

[Automatedresponsebot]

Wow, one of my science teachers in middle school used to show us your videos all the time. This is like a trip in a time machine

[mtdeezy]

Kind of interesting I think that you can tell how long the reaction takes from the high speed video by counting how many times the light flickers during the reaction. The AC cycle is 1/50 second, it flickers twice per cycle, so each flicker is 1/100 second. It flickers about 20 times during the reaction, so it takes about 1/5 of a second.

[adamqazsedc]

4:53 Sam's reaction is absolutely adorable!

[AMTunLimited]

She nerds out, and it's adorable. I love to see that kind of excitment in science.

[garyv]

I'm really enjoying the use of the high speed camera for these old school reactions. It really is a new perspective

[DLCoates]

@SmarterEveryDay is awesome for helping you guys film this with the high speed!

[cristianfcao]

4:52 That was one of the BEST "reactions" I've seen in this channel!! That girl REALLY loves chemistry!

[darkshad]

The hand held and heavy handed zoom & focus is Brady's style. I like it, keeps the eyes busy.

[SapphireSiren]

This is absolutely beautiful. The swirls that the solution makes when changing color are amazing.

[oliverberry]

One of my favourite reactions! I am doing it this Friday with a class of 16 year olds... I can't wait for their reaction!

[MephistoRolling]

her reaction to seeing the slow motion gave me a giant smile!

[DontMockMySmock]

That is one of the most amazing pieces of high-speed film I've ever seen.

[tommo]

I was going to tag SmarterEveryDay in this video when I saw the high speed camera. Then, he is in the video

[DynamixWarePro]

I have seen that reaction many times, but great seeing it in slow motion, especially seeing her reaction to it at 4:52!

[sizwembokazi]

The video is impressive! Thanks Prof and your team.