FIS0184
Fevereiro
Efeito Fotoelétrico
e Efeito Compton.
Planck's constant commemorates the
anniversary of Planck 's death in 1947.
Albert Einstein's (1879-1955) name is associated
with the general and special theories of relativity, but his explanation
of the photoeletric effect, a phenomenon which could not be accountex for
by electromagnetic wave theory, won him the Nobel prize in physics. He
proposed a corpuscular model of radiation as the photoeletric mechanism.
Light travels in quanta (or photons) and must be of a certain threshold
energy (or color) to cause the emission of electrons from a given surface,
while its intensity determines only the number of electrons so released.
This German stamp shows electrons escaping at random angles while light
strikes the surface.
|
WeeK_LinK:
Efeito
Fotoelétrico (em português)
Efeito
Fotoelétrico (simulação!)
Efeito
Fotoelétrico (teoria!)
Efeito
Compton (simulação!)
Efeito
Compton (teoria!)
Personage_LinK:
Albert Einstein
If I were to have the good fortune to pass my examinations,
I would go to Zurich. I would stay there for four years in order to study
mathematics and physics. I imagine myself becoming a teacher
in those branches of the natural sciences, choosing the theoretical
part of them. Here are the reasons which lead me to this plan.
Above all, it is my disposition for abstract and mathematical thought,
and my lack of imagination and practical ability.
.
voltar