Accelerators & detectors: Nuclear and Particle: Edexcel A-level Physics
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- Опубликовано: 25 авг 2024
- Covering lots of specification points, this video deals with eV, the two types of accelerator you need to know, and the principles behind interpreting particle tracks.
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underrated video
These videos are so good!
Hey. For the cyclotron, you mentioned that it's working has come up for 6 marks in exams... so to explain the working, do we use D1 and D2 to explain? Is that the standard of a cyclotron? Or is that just for the labelling purposes of a cyclotron and that the examiner will not understand what D1 and D2 means. If it's the latter, please paste the marking scheme of these types of questions so I get a rough idea of what I'm supposed to write if a question like this does come.
I would suggest you label them D1 and D2 and then refer to those in your answer. That is the best way of ensuring there is no doubt. They are sometimes referred to as ‘Dee’ also but the labelling removes any possibility of misunderstanding.
@@nutshellphy could you please guide me to a question paper where they have asked this question ?
October 2019, Unit 4 (WPH4/01) Q14. Not on PMT but I will find another!
Q13, 2017, Paper 1, Home A-level. I know you're doing IAL but it's identical to the Oct 2019 question.
www.physicsandmathstutor.com/past-papers/a-level-physics/edexcel-paper-1/
@@nutshellphy Thank you so much
The first accelerator based on the principle of repetitive acceleration was the cyclotron, invented by Ernest Lawrence in 1930 /Nobel Prize 1939/.
Since then, many different large accelerators have been built to study matter on ever smaller scales, and many (thousands) of "new" different particles have been discovered.
But these thousands of new and different particles did not help to understand the fundamental physical laws that govern matter, energy, space and time.
If for more than 100 years of studying quantum particles by breaking them up in accelerators, there is NO answer to the fundamental laws of quantum physics, then it is very possible that ''. . . at least one big idea is missing.” /Book: "The Trouble with Physics". Page 308. Lee Smolin/
"labelled diagram showing Dees
with E field indicated across gap OR B field through Dees (1)
E field is reversed/alternates (1)"
Could you please explain how they expect us to draw the Dees and label them?
A little hard to explain here but a simple sketch is all that's needed. With arrows representing either field. Electric field is probably easier to show as it is just between the 2 Dees.
hi sir, will you be planning to make any videos for waves?
I am, for sure. But I’m trying to get all the Y13 ones done for this summer first and then I will make them for waves and quantum.
sir does the gap length between the tube change or stay constant because there was a question in jun 2022 that said the gap length increases in the first section of linac and becomes constant in the final sections.
probably a very late reply..
but the gap length has to stay constant so that the frequency stays constant and the particle accelerates as soon as it enters the electric field in that question however they referred to the distance of the drift tubes which increases as the particle is speeding up so that it spends the same amount of time in each tube and the distance stays constant as the particle has reached relativistic speeds so it cant be accelerated further so both speed and time becomes constant and so does the distance....🤝 btw r u done with ur u4?
Also, I just can't seem to understand the "right hand grip rule" and the "fleming's left hand rule" as I always seem to mess up the "into the page" and "out of the page" fundamentals which therefore, messes up the direction of my fingers, giving me a very inaccurate answer. It would be great if you could help me with this by making a video on it or by linking me to a video on RUclips which can explain these rules properly, following Edexcel guidelines.
Okay. Let me have a think about it and I’ll see what I can do.
@@nutshellphy Okay tysm! Is there any way where we could possibly do paid private zoom sessions for the month of April?
That is certainly possible but have you looked at my Patreon tiers? The link is in the videos' description box. It's a work in progress as I build the channel and so might work out very well for you!
And for now, the right hand grip rule is just to give you the direction of the mag field around a current-carrying wire. Useful in very limited circumstances.
FLHR is the main one. Make sure all fingers are perpendicular to each other. First Finger = Field (point N to S). seCond finger = Current (point + to -). thuMb = Motion (ie force). It is used for motors and generators. As long as you can remember that if electrons are moving, the 'current' is in the opposite direction.
There is a Fleming's Right Hand Rule that some people like but I think that just adds a layer of unnecessary confusion!
@@nutshellphy The third package looks perfect for me. Could you provide me a rough estimate of how long it would take for a brief summary of all the unit 4 and 5 topics? I'm interested.