Photoelectric Flashcards
(11 cards)
What does photoelectric effect only work with
Metal surfaces
What does the photoelectric effect prove
That light is a particle
What can a single electron absorb
A single photon of light
Why don’t non-metals show photoelectric effect
No free electrons
Photoelectric parameters:
Work function
Threshold frequency
Photoelectric current
Stopping potential
What is work function
Minimum energy needed by an electron to escape from the metal surface
What does the work function depend on
The metal
What is threshold frequency
Minimum frequency of incident electromagnetic radiation needed to cause photoelectric effect
Why is threshold frequency needed
To allow photo electrons to be freed from the metal surface
Work function =
Planck’s constant * threshold frequency
Kinetic energy =
Planck’s constant * speed of light * work function
