P. Optical Phenomena

Question 1

Describe the Photoelectric Effect

Answer 1

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

Question 2

Define Threshold Frequency

Answer 2

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

Question 3

Define Work Function

Answer 3

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

Question 4

What is Atomic Absorbtion

Answer 4

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

Question 5

What is Atomic Emission

Answer 5

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