Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > Particle Physics > Flashcards

Particle Physics Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is an isotope?

A

Atoms with the same proton number, but different neutron numbers.

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

What is the equation and units for specific charge?

A

Charge / Mass, units = C/Kg

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

What are the effects on nucleons of the strong nuclear force between 0-3fm?

A
  • Between 0-0.5 fm, repulsive.
  • Between 0.5-3 fm, attractive.
  • No effect beyond 3 fm.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the effect on the nucleon number (A) and the proton number (Z) when alpha decay occurs?

A

A - 4
Z - 2

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

What is the effect on the nucleon number (A) and the proton number (Z) when beta minus decay occurs?

A

A
Z + 1

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

What is the effect on the nucleon number (A) and the proton number (Z) when beta plus decay occurs?

A

A
Z - 1

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

What are the products of beta minus decay?

A

Electron + anti-neutrino

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

What are the products of beta plus decay?

A

Positron + neutrino

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

What is Planck’s constant (include units)?

A

6.63 x 10 ^(-34) Js

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

What is the equation for the power of a laser beam?

A

P = number of photons leaving per second x h x frequency

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

What is the only stable baryon?

A

Proton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are antiparticles?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is annihilation?

A

When a particle meets its antiparticle, their combined mass is converted into energy (released as 2 photons).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How would you convert eV into Joules?

A

Multiply by 1.6 x 10 ^(-19)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe the process of pair production.

A

When one gamma ray photon passes near a nucleus, it produces a particle and an antiparticle with the same energy as the photon.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are leptons?

A

Particles that are not composed of any smaller particles.

17
Q

What two particle groups can hadrons be split into?

A

Baryons and mesons.

18
Q

What is the quark structure of a meson?

A

Quark, anti-quark pair.

19
Q

What is the quark structure of a baryon?

A

3 quarks OR 3 anti-quarks.

20
Q

What does the strong interaction effect and name the exchange particle.

A

All hadrons, gluon / pion.

21
Q

What does the weak interaction effect and name the exchange particle.

A

All particles, W-bosons (+ and -).

22
Q

What does the electromagnetic force effect and name the exchange particle.

A

All charged particles, virtual photon.

23
Q

Which interaction conserves strangeness?

A

Strong interaction.

24
Q

Which interaction does not conserve strangeness?

A

Weak interaction.

25
Q

What is the work function?

A

Minimum energy of incident photon required to remove an electron from the surface of a metal.

26
Q

Why is there a threshold frequency for the photoelectric effect?

A

Photon must have at least the frequency to have enough energy for the work function.

27
Q

What is the gradient on a Ek against frequency graph?

A

Planck’s constant.

28
Q

What is the stopping potential?

A

Voltage required to have enough energy to remove the Ek from an electron crossing the photocell (stopping it from crossing).

29
Q

What does increasing the wavelength of the light do to the photons?

A

Decreases energy of photons.

30
Q

What does increasing the intensity of a light source do to the photons?

A

Increases number of electrons.

31
Q

What is the ground energy level state?

A

The state of the lowest energy for that electron.

32
Q

What happens when an electron moves down an energy level?

A

A photon is emitted with the same energy of the gap between the levels.

33
Q

What is saturation current?

A

Maximum value of current in photoelectric effect.

34
Q

What is the use of mercury vapour in a fluorescent lamp?

A

Current excites the electrons in mercury vapour atoms, when they relax again the atoms emit photons of UV spectrum.

35
Q

What is the use of the phosphor coating in a fluorescent lamp?

A

Phosphor coating absorbs UV photons and atoms become excited, when they relax photons of visible spectrum are emitted by the coating.

Physics (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions