Quantum Phenomena

Question 0

What is the threshold frequency?

Answer 0

The minimum frequency of light that can cause photoelectric emission

Question 1

What is the work function?

Answer 1

The minimum energy needed for an electron to escape from the surface of a metal

Question 2

What is ionisation?

Answer 2

Any process of creating ions

E.G alpha, beta and gamma radiation create ions when they pass through substances and collide with atoms in that substance

Question 3

What is meant by ground state?

Answer 3

Lowest energy state of an atom

Question 4

Define ionisation

Answer 4

Any process that creates ions e.g alpha, beta and gamma radiation

eV

Question 5

What is excitation?

Answer 5

The process where an atom absorbs energy with out becoming ionized as a result of an electron in the atom moving from an inner shell to an outer shell

Question 6

What is the threshold frequency?

Answer 6

The minimum frequency needed for electrons to overcome the work function