Wave-particle Duality Flashcards
1
Q
Planks constant
A
6.63x10^-34
2
Q
What equation uses planks constant
A
Wavelength = h(planks constant) / p(momentum)
3
Q
If an atom absorbs some energy then..
A
Electrons can be excited up into higher energy levels
4
Q
If an atom absorbs loads of energy then..
A
It ionises
5
Q
If an atom emits some energy then..
A
An excited electron will de-excited down to a lower energy level
6
Q
What does the photo electric effect demonstrate
A
It depends on the frequency and not the intensity
7
Q
How to work out the work function
A
Hf-Ekmax
8
Q
What does stopping voltage equal in work function equation
A
Ekmax
9
Q
Stopping voltage graph - gradient
A
H/e
10
Q
Stopping voltage graph - hits y-axis
A
-work function/e
11
Q
Stopping voltage graph - hits x-axis
A
Fresh hold frequency
