Might have been a good video. I don't know because the volume was too low to hear. I'm listening on my phone and I got the volume jacked.

it was immensely helpful but at times you sped up the explanation so sometimes I didn't understand what you said so can you plz improve that

Best video I’ve ever watched. Lowe I’m coming to teach physics in the uk cos of you

Miss Lowe how are you just letting you to know I love you demo. I want to come and teach in uk I’m from Ghana

Wow this is great

One doubt even though this video is three years ago My doubt is should we be wearing glasses to prevent the radioactive source from affecting our eyes

👏👏👍

Saving p2 fr

To detect alpha, you need a vacuum Si-detector, not a Geiger counter.

You should not try to shield beta- radiation with a heavy material such as lead. The hi-Z atoms in the lead decelerate the beta- electrons and also change their direction. Both cause the electrons to loose kinetic energy, which is radiated outward as Brehmsstrahlung. This is in the X-ray spectrum and is penetrating and harmful ionising radiation. And it shoots off in any direction.

Which material Cannot XRAY penetrate

Wow that was very interesting! I hope beta source did't make any harm to you.

Very useful.......thank you

Hi did you do videos for topic 9-15 for gcse edexcel physics (Paper 2)

kzfaq.info/get/bejne/iqyZaMV918imemg.html una radiografia o meglio gammagrafia con un campione di pechblenda di Marie Curie

Americium wasn't stopped by paper most likely because you don't have alpha sensitive geiger counter. I'd bet it can only detect beta and gamma. You have most likely measured these two and alpha wasn't present, because count would be much higher. Also alpha source is pretty safe to handle. You don't have to worry about looking at it directly. :)

Can u pls do the last q

Thank you for video lecture. For average person thouse tests looks so scary. And in my imagination i thought i am seeing miss Curie herself.

not all heroes wear capes ❤️

For 6.3, isn't the answer C because the half-life is equal to 2.4? The half-life should be calculated at the point when 120 count remains since 220 count minus the background radiation of 20 = 200, 200/2 = 100, and 220 - 100 = 120.

Helpful thank you! 👍🏽👍🏽❤️❤️🤓🤓🤓 Here are some donuts🍩🍩🍩

Radiation can make you sterile. And you too hot to be sterile.. You are like a perfect baby machine...lol

I just had a nasty poo

Thank you! This is explained so well!!! I get this soso much more now 👍😁

Nice

Thank you so much! Just one question, why does the outer surface puff up when becoming a red giant or red supergiant?

amazing ... wish u had more subs

The only demonstrating video i seen in utube

my g

Amazing! Thanks!

Squizitzi!🤓

Bars

What was the Beta source?

Thank you for this. Really helpful I wish more students could see this video

Thankyou so much for making this video

Great video much more useful then my actual physics teacher

Lovely

Married with me !!

Nice video. I think the gamma source is Co 60 which was decayed partly due to the short half-life - 5.3 years :)

great explanation could relate this to my edexcel student book

This is very helpful thanks!!

Your voice is low. Thank you well explained

Loved your video❤️💯

"stopped by paper" *continues to work* 0_0

this was helpful thx

Hi do you by any chance have the A level Edexcel physics 2020 papers ?

Thanks! Really helpful during lockdown :)

Thank you so much!

Very nice demo

Thank you so much! This was genuinely such a great explanation for the topic, I might just have to watch every single one of your physics videos now.