Radioactivity and Radiation: GCSE revision

[@callummicallefkelly1450]

the world needs more teachers like this

[@figurefiguras4104]

Ur an amazing teacher, I wish Ur video Had captions on them :) Greetings from Morocco !

[@steveherbert504]

DrPhysicsA, Apologies in advance if my question appears off topic. Question: When an electron is accelerated in a cathode ray tube, I am to understand that it will emit radiation based upon the premise that any charged particle will radiate when undergoing acceleration. However all the texts I have come across to date, specify the 'glow' or different light colours observed are due to the electrons colliding with the glass surround and/or vestiges of Oxygen/Nitrogen molecules (CRT not an absolute vacuum). WhIch explanation would be deemed as being correct? I'd be obliged, Steve

[@michaelhazell7065]

'Our good old friend' 😂 good video it helped me out

[@profesormarzano8090]

yes Dr. physics was very supportive. Thank you Dr. physics

[@sgsgame9882]

Why didn't I find you sooner! I have my physics exam in 2 days!! aggrr * Watches video after video*

[@DrPhysicsA]

Sophie Dodds Hope it goes well. All good wishes.

[@elianeround7166]

Mine is tomorrow :/

[@DrPhysicsA]

Eliane Round All good wishes to you too.

[@ToothTalksTaste]

Thanks for this - your videos are very easy to understand.

[@Lakesaltwalker]

You say that Beta particles are negative, but the physics book I am reading discribes them as positive or negative and so can diverge either way when entering a magnetic field. Even has a diagram to that effect ?

[@DrPhysicsA]

+Roger Spence True. They can be -ve or +ve. But the stable form is -ve and it it these which were discovered first. +ve electrons or beta particles are also called positrons which survive only for a fraction of a second before meeting an electron and annihilating.

[@TheGeekyCrafter]

Thank you so much for posting this video. It was the only thing that made me understand this topic which I really struggle with. Thank you!

[@Cashman9111]

14:26 so now thorium has 2 too many electrons, what happens with them ?

[@mahmoudm451]

Can we consider alpha particles to be plasma? since you said in a previous video, that plasma is the 4th state of matter, and it happens when at very high temperatures, the atoms lose all their electrons..?

[@chiranthsiddesh5783]

Great explanation! Thank you!!

[@elianeround7166]

This is really helpful! Thank you :)

[@DrPhysicsA]

Eliane Round Thanks. Kind of you to say so.

[@Cashman9111]

@@DrPhysicsA 14:26 so now thorium has 2 too many electrons, what happens with them ?

[@IMadeOfClay]

Hello, sorry if this is a silly question. An alpha particle (i.e. a helium nucleus) is radioactive. Why isn't, say, a carbon nucleus radioactive? Thanks in advance.

[@DrPhysicsA]

An alpha particle is not radioactive. It is the product of the decay of an element which is. Although it is for university level, you might want to look at my video in the nuclear physics playlist on the semi-empirical mass formula which attempts to explain why some elements are radioactive.

[@FactoryVortex]

Does that mean if alpha particles meet 2 loose electrons, it will become a stable isotope of Helium-4?

[@FactoryVortex]

And does that mean beta particles can get snatched by a positively charged ion and make it stable?

[@DrPhysicsA]

+Amiriz Ardiwijaya Yes alpha particles can capture electrons to become helium provided the electrons do not have too much energy (otherwise they will just escape again). Beta particles are electrons.

[@FactoryVortex]

DrPhysicsA Thanks! Great video, by the way...

[@PeguinDesign]

THANK YOU DR PHYSICS!!!

[@tanjimahmed6652]

if an alpha partical has two plus charge shouldn't it deviate more then beta partical ?

[@aMartianSpy]

Its a lot heavier

[@pineappleawkward8199]

My double physics exam is tomorrow and this has helped a lot. Thank you so much you really cleared it up for me.

[@DrPhysicsA]

PineappleAwkward Thanks. All good wishes for the exam.

[@cantnessa2065]

this video saved me tysm this was very helpful

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bit overall a really good video answered most my questions

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would love you as my physics teacher helped alot thanks

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same my teacher is good but gets pupils lost.

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[@DrPhysicsA]

Thanks. Hope the exam goes/went well.

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YESSS IT did I got an A!!!! THANK YOU SO MUCH

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Don't even understand it