Domain 7 . Quantum World
Tunneling & Quantum Effects
Wave-Partida Duality barriers
tunneling
↳ Particles can cross potential they shouldn't >
-
de
Brolige wavelength : X =
A= Ex .
applications :
↑
momentum ↳ STM (Scanning Tunneling Microscope)
Photoelectric Effects p =
mu ↳ Alpha Decan
Ephoton = If
Ephoton = W +
Ek Uncertainty Principle
-
> W work function (minimum energy to free election)
op=
=
0x -
3
Ex =
max Kinetic energy of emitted electron
Atomic Models
Bohr model :
e
=
↳
Electrons in quantized orbits En-E
↳
Energy levels :
En =
-16 e
↳ Emission/absorption of photons when electron
jumps between levels
Ephoton =
Einitial- Efinal
,Wave behaviour of light
.
Diffraction
↳ Election bears
Photoelectic effect Shows that
.
light consists of photons -
each of which carries
energy
proportional to frequency.
Eph = If (photons)
De
Broglie's Equation
↳ for wave behaviour of subatomic particles Electrons).
Momentum of the particle (Rgms") =
Constants
Ranch m
p =
m
=
= =
, Heisenberg Uncertainty Principle
The more precisely you know a particle's position , the less precisely you can know its momentu, and vice
versa .
2x ·
Opt
Xx
uncertainty in position (m)
=
Op uncertainty in momentum
(Rg m/s)
:
=
↳ mov
H
= = 1 .
055x10-34 Is
Bohr Model of a
hydrogen atom
↳
Energy is
negative
>
-
election is bound to the atom
In
↳ less bound.
- less
negative
- election is
tightly
↳ E= O electron is free Cimised)
,
state to
free
ground
-
Energy of hydrogen
enization
energy of
ou
electron in level n =
-
principal grante number
En =
- er B 6
.
(
Tunneling & Quantum Effects
Wave-Partida Duality barriers
tunneling
↳ Particles can cross potential they shouldn't >
-
de
Brolige wavelength : X =
A= Ex .
applications :
↑
momentum ↳ STM (Scanning Tunneling Microscope)
Photoelectric Effects p =
mu ↳ Alpha Decan
Ephoton = If
Ephoton = W +
Ek Uncertainty Principle
-
> W work function (minimum energy to free election)
op=
=
0x -
3
Ex =
max Kinetic energy of emitted electron
Atomic Models
Bohr model :
e
=
↳
Electrons in quantized orbits En-E
↳
Energy levels :
En =
-16 e
↳ Emission/absorption of photons when electron
jumps between levels
Ephoton =
Einitial- Efinal
,Wave behaviour of light
.
Diffraction
↳ Election bears
Photoelectic effect Shows that
.
light consists of photons -
each of which carries
energy
proportional to frequency.
Eph = If (photons)
De
Broglie's Equation
↳ for wave behaviour of subatomic particles Electrons).
Momentum of the particle (Rgms") =
Constants
Ranch m
p =
m
=
= =
, Heisenberg Uncertainty Principle
The more precisely you know a particle's position , the less precisely you can know its momentu, and vice
versa .
2x ·
Opt
Xx
uncertainty in position (m)
=
Op uncertainty in momentum
(Rg m/s)
:
=
↳ mov
H
= = 1 .
055x10-34 Is
Bohr Model of a
hydrogen atom
↳
Energy is
negative
>
-
election is bound to the atom
In
↳ less bound.
- less
negative
- election is
tightly
↳ E= O electron is free Cimised)
,
state to
free
ground
-
Energy of hydrogen
enization
energy of
ou
electron in level n =
-
principal grante number
En =
- er B 6
.
(
