Quantum Physics

Question 1

Work function

Answer 1

The minimum energy required to remove an electron from a
metal’s surface

Question 2

Threshold frequency

Answer 2

minimum frequency for electrons to be emitted through the photoelectric effect

Question 3

Ionisation energy

Question 4

Photoelectric effect

Answer 4

the emission of electrons from a material caused by electromagnetic radiation

Question 5

Stopping potential

Answer 5

The minimum potential difference required to stop the
highest kinetic energy electrons from leaving the metal plate in the photoelectric
effect.

Question 6

Excitation

Answer 6

The process of an electron taking in exactly the right quantity of
energy to move to a higher energy level.

Question 7

Electron volt

Answer 7

The work done to accelerate an electron through a potential
difference of 1V.

Question 8

Photon

Answer 8

a packet of light(energy)

Question 9

Quanta

Question 10

Fluorescence

Answer 10

the ability of certain chemicals to give off visible light after absorbing radiation which is not normally visible