Quantum Physics Flashcards
(7 cards)
1
Q
State why light has a dual nature
A
- Wave
- Particle: photoelectric effect
2
Q
Describe an experiment which proves that light also has particles
A
When a negatively charged electroscope is exposed to UV light, it becomes less negatively charged
3
Q
State planckโs constant
A
6,6x10^-36
4
Q
Now, give the entire intergrated formula used to calculate stuff about the photoelectric effect
A
hf = ๐ + 1/2mv^2 = E = mc^2
5
Q
What is meant by f0 (threshold frequency)?
A
The minimum light frequency required for the photoelectric effect to take place
6
Q
What does ๐ stand for?
A
๐ is the work function of the material, and is calculated by
๐ = hf0
7
Q
State the speed of light
A
c = 3x10^8
