Photons Flashcards
1
Q
What are the photons?
A
The particles of light
2
Q
Velocity of light in vacuum
A
c = 3x10*8 m/s
3
Q
The energy of a photon is given by:
A
hω= hc / λ
4
Q
The sun has a spectrum which is
A
Close to the one of a black body
5
Q
A black body is defined as
A
A body which completely absorbs radiation of
photons of all energies.
6
Q
Rayleigh-Jeans
A
Description in long
wavelength range
7
Q
Wien (1897)
A
- Good description in
short wavelength range - Deviation in long
wavelength range
8
Q
Planck (1900)
A
- Correct description
- Theoretical explanation
- Start of Quantum
physics
- Start of Quantum
