Optical Phenomena

Question 1

Photoelectric effect

Answer 1

The process whereby electrons are ejected from a metal surface when light of suitable frequency is incident on the surface

Question 2

Threshold frequency, fₒ

Answer 2

The minimum frequency of light needed to emit electrons from a certain metal surface

Question 3

Work function, Wo

Answer 3

The minimum energy that an electron in the metal needs to be emitted from the metal surface

Question 4

Atomic absorption spectrum

Answer 4

Is formed when certain frequencies of electromagnetic radiation passing through a substance is absorbed

Question 5

Atomic emission spectrum

Answer 5

Is formed when certain frequencies of electromagnetic radiation are emitted due to an atom making a transition from higher energy state to a lower energy state.