Important formulae & basic concepts Chapter: XII...
1
Important formulae & basic concepts Chapter: Dual nature of matter and radiation XII Physics Energy of each photon is E h = ν Momentum of a photon is h p = λ h is Planck’s constant and h = 34 6.63 10 . x Js - is the frequency is the wavelength ν λ Einstein’s photoelectric equation states that max 0 K h = ν-φ 0 φ is the work function. The stopping potential V 0 is related to maximum kinetic energy as 0 max eV K = V 0 is the stopping potential Threshold frequency can be found from work function as 0 0 h φ = ν 0 ν is the threshold frequency Photoelectric equation can be written as 0 0 0 0 eV h h or V e e = ν-φ φ ν = - de Broglie wavelength of a moving particle is h p λ= is the wavelength of incident light λ p is the momentum h is Planck’s constant and h = 34 6.63 10 . x Js - de Broglie wavelength of a moving particle is 2 h p p Kinetic energy,K = 2m h Then = 2mK λ= λ is the wavelength of incident light λ p is the momentum h is Planck’s constant and h = 34 6.63 10 . x Js - K is the kinetic energy of the particle m is the mass of the particle
-
Upload
trinhquynh -
Category
Documents
-
view
216 -
download
1
Transcript of Important formulae & basic concepts Chapter: XII...
Important formulae & basic concepts
Chapter: Dual nature of matter and radiation
XII Physics Energy of each photon is E h= ν
Momentum of a photon is h
p =λ
h is Planck’s constant and h = 346.63 10 .x J s
−
is the frequency
is the wavelength
ν
λ
Einstein’s photoelectric equation states
that
max 0K h= ν − φ
0φ is the work function.
The stopping potential V0 is related to
maximum kinetic energy as 0 maxeV K=
V0 is the stopping potential
Threshold frequency can be found from
work function as 0 0hφ = ν 0ν is the threshold frequency
Photoelectric equation can be written as
0 0
00
eV h
hor V
e e
= ν − φ
φν= −
de Broglie wavelength of a moving
particle is h
pλ =
is the wavelength of incident lightλ
p is the momentum
h is Planck’s constant and h = 346.63 10 .x J s
−
de Broglie wavelength of a moving
particle is 2
h
p
pKinetic energy,K =
2m
hThen =
2mK
λ =
λ
is the wavelength of incident lightλ
p is the momentum
h is Planck’s constant and h = 346.63 10 .x J s
−
K is the kinetic energy of the particle m is the mass of the particle
