Quantum Physics

Question 1

Photoelectric effect

Answer 1

A phenomenon in which electrons are liberated from a cool metal surface when electromagnetic radiation of sufficiently high radiation is incident upon it

Question 2

Photon

Answer 2

A quantum of electromagnetic radiation

Question 3

Work function

Answer 3

The minimum amount of energy required to remove an electron from the metal surface (i.e. The energy required to remove the least strongly held electron)

Question 4

De-excitation

Answer 4

Refers to the atom/electron jumping from a higher energy state to lower energy state, usually resulting in the release of a photon.

Question 5

X-Ray spectra

Answer 5

X-rays are produced when high-speed electrons, accelerated through a large potential difference, collide with a metal target, and are slowed down.

Question 6

Wave-particle duality

Answer 6

Light behaves both as photons and as a wave