7: Equations Flashcards

1
Q

energy carried by a photon (discrete packet of em radiation)

A

E = hf = hc / lambda

E = energy (joules)

h = planck’s constant (6.63 * 10^-34 Js)

c = speed of light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Threshold frequency

A

f = Φ/h
where Φ = work function (J)
and h = Planck’s constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is Φ?

A

The work function of a metal - it is the amount of energy required to remove an electron from the surface of the metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Maximum Kinetic Energy =

A

Ek = hf - Φ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Relationship between probability and resultant phasor

A

Prob. ∝ (Resultant phasor)²

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

equation with electronvolt, mass and velocity

A

eV = 1/2 mv²

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

ways to write energy carried by a photon

A

E = hf = hc/lambda = eV0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

how to show change in energy between 2 energy levels

A

change in energy = E2 - E1 = hf = hc / lambda

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

equation to work out frequency of phasor rotation

A

f = E / h

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

de broglie equation

A

lambda = h / p = h / mv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

how to work out frequency for the phasor for an electron

A

f = Ekinetic / h
Ekinetic = 1/2 mv²

How well did you know this?
1
Not at all
2
3
4
5
Perfectly