Flashcards in Week 10 Uncertainty Principle & Schrodinger Equation Deck (10)

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1

## what is the Uncertainty principle equation

### ΔxΔp = αh(bar) / 2

2

## when is the uncertainty principle used

### when α is unknown

3

## what is the energy-time uncertainty relation equation

### αh(bar) / 2 = ΔEΔt

4

## what is the procedure to find frequency of a photon using the energy time uncertainty

###
1 say Δt is very large so that the photon could be anywhere so we can find p

2 use the momentum to find E

3 recall that E = hf so hΔfΔt ~ h(bar) => ΔfΔt ~ 1

5

## what can the Schrodinger equation be used for

### it can be used to derive Ψ

6

## what does the time independent Schrodinger equation refer to

### the Schrodinger equation that works/corresponds to particles of definite energy

7

## what is the Hamiltonian of a system and its accompanying equation

###
Total energy of a system

H = p^2 / 2m + V

V is the potential energy

8

## what is the time independent Schrodinger equation

### EΨ(x) = ( -h(bar)^2 / 2m d^2/dx^2 + V(x) ) Ψ(x)

9

## How do V and Ψ relate to each other

###
If V is infinite then Ψ must be 0

If V is 0 then Ψ can be found

10