Quantum concepts Flashcards
What does light have properties of?
Both waves and particles
How do standing waves travel?
Not very far as they are constrained to a particular media
What do standing waves interfere with?
The waves coming back down
What happens to the nodes produced?
They don’t move
What is interference a property of, waves or particles?
Waves
What is the De Broglie model of the atom look at regarding waves?
- Considers the nature of waves constrained by boundary conditions
- Standing waves can only form for certain specific wavelengths
What must the amplitude of a standing wave be when x<0 and x>L
Zero
What is the general solution for allowed wavelengths?
nλ / 2 = L
What is the equation for photon energy?
E = h v
Planck’s constant x frequency
What is the equation for momentum?
P = h / λ
What do you have to observe electronic energy directly?
Look at transitions
What is the equation for the energy of a level?
n²h² / 8mL²
What is the equation for the energy of the transmission between n and n+1 levels of energy?
(2n+1)h² / 8mL²
What does the schrodinger equation predict?
The vibrational, electronic and rotational energy of molecules is quantised into discrete energy levels
What happens when you increase the length of the delocalised chain?
There is a decrease in energy and an increase in wavelength
