Why are Smoke Detectors Radioactive? And How do Smoke Detectors Work?

I like that you coherently used physically accurate electron orbitals. Not just spheres, but actual nested shapes.

It's interesting that Geiger counters are sort of the inverse of smoke detectors. With smoke detectors, you have radiation and look for a gas, while with Geiger counters, you have a gas and look for radiation.

I love how educational this is, and the animations help so much it's unreal. Thank you!

As an engineering student who took up engineering for the love of physics and mathematics (partly inspired by great content on YouTube, this channel included), I really appreciate you trying to deep dive into stuff no one bothers to know! A humble smoke detector has so much going on behind the scenes. Keep inspiring new people :)

I greatly enjoyed the humorous bits: “The battery, which is always dead”, “When burnt pop corn…”, “…indicating that you are bad at cooking”. Hahaha.

I can't get enough of your videos! They are the best! The time spent on animation is amazing! Keep up the great work guys! You have many fans!

I can't express enough how much i am pleased with this video. And i love how you branched in a clever way to explain other relevant topics besides the mechanism of smoke detector and the incorporation of this mind blowing information about the sizes of atoms and the power they possess it's just amazing. The animation also is brilliant. I will always follow this channel and i hope you always upload videos like this without skipping any bits of information, the more dense the better :)

I love this! it's not too simplified and not too much detail, it's perfect!

I cannot express how valuable this video is. I'm 64 and very curious, this video answered many of my question about atoms and some I never new to ask. Even your (add) was related to your video. The animation showing the various sizes of atoms overlaid on the periodic table was brilliant.

I was once called to assist with a fire detection system used in a diesel engine generator room. The 'authorities' wanted to test the system, so they set fire to a large pan filled with diesel fuel. The whole room was filled with smoke, but no alarms sounded. At this stage I entered the scene - I started the fan and got the 'diesel smoke' out. Then I got a cigarette from one of the engineers - lit it - and blew smoke into the fire detectors - all worked fine - the alarm sounded every time. Why you may ask. Smoke from burning fuel is (very) dark/black - and black does not reflect light - the cigarette smoke is 'white' - which reflects lights. Wisdom: look at what kind of smoke a fire will generate - the select the type of detector.

Just amazing work, simple to understand explanation, wonderfully made animations , Thank you to entire team for bringing such an amazing videos to us. 🌹👍

I love this video, the visual explanation is amazing the detail that your team must go through to gather as this information then sort it in a way so that most people can understand and to then make an animation for that then to synchronize everything is incredible truly making the world a better place. I also love the jokes that were put in and side mention of how it’s marketed effectively as it is both funny and still educational

This is very well put together. Amazing explanation & animation in demonstration. Thank for putting this together to share. Your content is top notch.

Unbelievable quality video. All your videos are so incredibly educational, I love watching your channel for hours on end. I often find myself revisiting your videos just to try and wrap my brain around the concepts you explain.

You are the one defining Education through Animations. Your animations are the most realistic and detailed. I am so glad that you do what you do.

Small thing but so much engineering going into it.. great explanation as always

That was a very excellent demonstration & explanation of the smoke detectors not only at the hardware level, but it was also interesting at fundamental level, I totally appreciate your work and efforts to create this video.

Recently discovered your channel and am blown away by the way you explain complex topics with quality and clarity.

So much information beyond the simple explanation. Love how in-depth you go. Also, how long did it take for someone to make this? So much knowledge needed to make something so "simple".

Great video! Reminds me of a neighbor who used this as a timer to remind her when her food was ready. Everyday for years.