Chapter 8 Physics
CHAPTER 8.0:
Quantization of light
(F2F:5 Hours)
1
, Chapter 8 Physics
Overview:
Quantization of light
Planck’s quantum Photoelectric
theory effect
hc
E hf
Einstein’s photoelectric
equation
E K max W0
2
, Chapter 8 Physics
Learning Outcome:
8.1 Planck’s quantum theory (1 hour)
State Planck’s quantum theory.
Distinguish between Planck’s quantum theory and
classical theory of energy.
Use Einstein’s equation for a photon energy,
hc
E hf
3
, Chapter 8 Physics
8.1 Planck’s quantum theory
8.1.1 Classical theory of black body radiation
Black body is defined as an ideal system that absorbs all the
radiation incident on it. The electromagnetic (EM) radiation
emitted by the black body is called black body radiation.
From the black body experiment, the distribution of energy in
black body, E depends only on the temperature, T.
E k BT (8.1)
where k B : Boltzmann's constant
T : temperature in kelvin
If the temperature increases thus the energy of the black body
increases and vice versa.
4
CHAPTER 8.0:
Quantization of light
(F2F:5 Hours)
1
, Chapter 8 Physics
Overview:
Quantization of light
Planck’s quantum Photoelectric
theory effect
hc
E hf
Einstein’s photoelectric
equation
E K max W0
2
, Chapter 8 Physics
Learning Outcome:
8.1 Planck’s quantum theory (1 hour)
State Planck’s quantum theory.
Distinguish between Planck’s quantum theory and
classical theory of energy.
Use Einstein’s equation for a photon energy,
hc
E hf
3
, Chapter 8 Physics
8.1 Planck’s quantum theory
8.1.1 Classical theory of black body radiation
Black body is defined as an ideal system that absorbs all the
radiation incident on it. The electromagnetic (EM) radiation
emitted by the black body is called black body radiation.
From the black body experiment, the distribution of energy in
black body, E depends only on the temperature, T.
E k BT (8.1)
where k B : Boltzmann's constant
T : temperature in kelvin
If the temperature increases thus the energy of the black body
increases and vice versa.
4
