Quantum

Question 1

What is the photoelectric equation?

Answer 1

hf=ф+KEmax

Question 2

Definition of threshold frequency

Answer 2

The minimum frequency of electromagnetic radiation that would cause the emission of an electron

Question 3

Definition of hf

Answer 3

Energy of a photon in Joules

Question 4

Definition of KEmax

Answer 4

The maximum kinetic energy of an electron in Joules

Question 5

Definition of ф

Answer 5

Minimum energy required to cause the emission of an electron from a metal surface

Question 6

How does the intensity of the light affect the Kinetic Energy of the electrons

Answer 6

It doesn’t as intensity only affects the rate at which photons are emitted, the actual interaction of photons and electrons occurs on a one to one basis

Question 7

Definition of 1eV

Answer 7

1 electron volt is 1.6x10^-19
- An electron volt is the energy acquired by an electron when accelerated through a p.d. of 1 volt

Question 8

Short definition of the photoelectric effect

Answer 8

The photoelectric effect is the emission of electrons from a metal when light is shone on the surface

Question 9

State de Broglie’s equation

Answer 9

λ=h/p or λ=h/mv