Optical Phenomena

Question 1

Photoelectric effect

Answer 1

Process that occurs when electromagnetic radiation or light shines in a metal surface and it ejects electrons from the metal

Question 2

Threshold frequency

Answer 2

The minimum frequency of radiation at which electrons will be ejected from the surface if a metal. Depends on the type of metal used

Question 3

Photon

Answer 3

A quantum of energy when the energy is in the form of electromagnetic radiation

Question 4

Transfer of energy by a photon conditions

Answer 4

Transfer occurs immediately
A single ohoton interacts with a single election. Cannot share energy between several electrons.will transfer all its energy (E) to the electron

Question 5

The work function of a metal

Answer 5

W =h f threshold

The minimum energy needed for an electron to be set free from the surface of a metal

Question 6

Atomic absorption spectra

Answer 6

Formed when certain frequencies of em radiation pass through a medium eg cold gas.. is absorbed

Question 7

Atomic emission spectrum

Answer 7

Formed when certain frequencies of eeradication are emitted due to an atoms electro s making q transition from a high eenergy state to a lower energy state