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Summary AQA A Level Physics revision poster - PARTICLES

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Colourful revision notes to aid A level physics revision. Brief but not missing any information. For topics particles/quantum physics

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Uploaded on
September 18, 2023
File latest updated on
September 18, 2023
Number of pages
2
Written in
2023/2024
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Summary

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Photoelectric eject




I
Forces gaugebosa
Particles exchange particle
prosors of sufficient energy
absorbed
wher al
by electrons ente
Em virtualphoran ,
I
surface of a metal ,
liberating then


Exmax=hf-
-




Strong nuchar pian/gewen Exmax
- neaRecten I weak wi , w+(20) a




~
Held together
by the Hadron leptors
I h planck's 6

626x10-34 energy
graving content
graviron
=




-candamental)
-
.



stong nuclear force da proter to
e g
electors , muone
7 =

frequency



-
- .
,



0 .
Sfm
3-4 Fr
=

↳epson
number ↓
& work function minimum energy lo liberate
I
=




Bayons electrons
-


X mesens

- made up of g ,5 charge lepton and bayen
,
Exmax= energy left over' after on e is liberated
-

number must always be
made up
of
fo-threshold
-




minimum frequency needed for electors *
I
-



+
-

+
ene frequency
at StateSlig
0
-

.


3
- e .
g , , conserved
.
quarks
to be liberated
e g P strangeness is
-



repulsive range is
n
anly
.
-
, ,

3 4 fan Bayon conserved
-



in
-

number
strong
interactions
The protoclectric effect proved the
particle nature y light due to the one-to-one interactions between

quarks se fundamental Protors and electrons . I t is are-to-one because
if
it were
eney a wave the
increasing the inserting a light
would increase the Er liberated
I the elec tors but it doesn't , all it does is increase the number o electrons
that se emitted per second .




to use E
=


MC2
To conver mass energy , stopping potential -

the pd needed to stop
any electron from reaching the other side

Annihilation -

when a particle and its corresponding antiparticl alice and Her rest
energy
is converted

Exmax= Vs
-



e
into protors


e-get
-




charge a n elec tron
e=
-




↳ E =
mc2 +"zm -




Stopping potential
=


Vs


Be


&
=
n


Pair production particle a d its
corresponding antiparticle The proton




when turns must have
proten
-



a into a .




at least the same amount or energy as see rest energy es the particles de Broglie
The is wavelength that particle


-
de Broglie wavelength the
a can have .




↓Fi
i
The wave r a t u re I a particle was proven by riving elec tors at a graphite
which
film produces circular fringes a a
florescen ser ver befind This is


Particles
.




because the elec tors
diffracting behind the carber atoms

and
are




Quantum
~ - 7 -




+ In a
graph
~
I
*
maxima


minima
Radiation ↓


>d




I
Ionising Hey give evehos enough energy to leave abos
their


meas




b Fr
Alpha particle-belium nucleus
,
He -




x =
=




highly corising it is very heavy
-

as



-weakly penetrating -




Stopped by piell d Paper ar Jew am or air
-
a
h =

de Broglie's wavelength
238

q2u
-

2 Th +
! -
me P/mv :
moveneum/mass velocity x




Beta-fast moving C
:




electron ->

-medium isnising abiviry
-



stopped by few em of aluminium
penetrating and a




Betadeay -Y +1 13+ Ye
antirumina Fluorescent tube
-



C t conserve number
- upon
,

(gark)
-




13 or e
cattoce
r
~- T andre " it
&
E
, e

me
-]
7 [ S




n
cor down crise
Thes This accelerates free electrons to
quark tubes contain mercury , across a high voltage is applied .
some


of the mercury atoms which produces more
free electrons
gamma-high energy Emray or
photon emitted from a high energy nucleus -
when the e aro u s collide with elec trons atows they are excited
gree in
mercury , to higher energy levels
weakly imising
-




when the dexcite envir UV range
electrone they photons in the
- highly penetrative
,
stopped by m's concrete
-

a
few er
A
prospher casing in
the tube absorbe the
protons and enit visible light




Es
Isorope-some element -

save number of Provons RAM- number
Energy levels
+
a protons
different relasive atomic mass different number g neutrons 12
exched to
-




higher energy levers Either by absorbing pretors that are equal to
-



neutrons Electrons be the
C can .




. !* a difference Or if a
proton number we r
eg free electron colides with i t giving the elec tron
-

energy
-
in
6 energy
.



,
,
number a potor

and number a Ionisation energy -


if enough energy is given to an elec tron it will completely escape the a to m
Specific charge
,
-
elections
(CKg .
-> absorbrier Spectrum
charge to mass ratio
-




I election
voit-charge of an election when accelerated
through a
pd of are voit emission
19
-> specim
I
-

-
1 6.
x 10

-
lev
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