Quantum

Question 1

1 Elevtronvolt

Answer 1

The energy transferred when an electron travels through a potential difference of 1 volt.

Question 2

Photoelectric effect

Answer 2

When electromagnetic radiation is shone on to a metal, electrons are released from the surface
of the metal

Question 3

Describe Einstein’s theory of photoelectric effect and wave-particle duality (4)

Answer 3

1. Individual photons are absorbed by individual electrons
2. Only photons with the energy above the work function energy will cause photoelectric emission
3. Photon energy is proportional to frequency
4. Wave model of light does not show photoelectric emission