Particles, Antiparticles & Photons 2.1.5

Question 1

what is antimatter

Answer 1

Antimatter particles are identical to their matter counterpart but have an opposite charge
—>This means if a particle is positive, its antimatter particle is negative and vice versa

Question 2

state the symbol for a proton

Answer 2

P

Question 3

state the symbol for an antiproton

Answer 3

-
P

Question 4

state the symbol for a neutron

Answer 4

n

Question 5

state the symbol for an antineutron

Answer 5

-
n

Question 6

state the symbol for an electron

Answer 6

e-

Question 7

state the symbol for a positron

Answer 7

e+

Question 8

state the symbol for a neutrino

Answer 8

Ve

Question 9

state the symbol for an antineutrino

Answer 9

-
Ve

Question 10

state the relative charge of a proton

Answer 10

+1

Question 11

state the relative charge of an antiproton

Answer 11

-1

Question 12

state the relative charge of a neutron

Answer 12

0

Question 13

state the relative charge of an antineutron

Answer 13

0

Question 14

state the relative charge of a electron

Answer 14

-1

Question 15

state the relative charge of a positron

Answer 15

+1

Question 16

state the relative charge of a neutrino

Answer 16

0

Question 17

state the relative charge of an antineutrino

Answer 17

0

Question 18

state the mass (kg) of a proton and antiproton

Answer 18

1.67 * 10^-27

Question 19

state the mass (kg) of a neutron and an antineutron

Answer 19

1.67 * 10^-27

Question 20

state the mass (kg) of an electron and a positron

Answer 20

9.11* 10^-31

Question 21

state the mass (kg) of a neutrino and an antineutrino

Answer 21

0

Question 22

what do corresponding matter and antimatter particle have

Answer 22

-opposite charges
-the same mass
-the same rest mass-energy

Question 23

what is wavelength

Answer 23

the distance between the two adjacent crests of a wave (m)

Question 24

what is frequency

Answer 24

the number of waves passing a point per second (Hz) or (S^-1)

Question 25

what is the equation for wave speed.

state what each symbol means

Answer 25

wave speed (ms^-1) = frequency (Hz) * wavelength (m)

C = f * λ

C = speed of light in a vacume
f= frequency of EM radiation
λ = wavelength of EM radiation

Question 26

what is a photon

Answer 26

wave-packets which are emitted a short bursts of waves

Question 27

what equation links energy, frequency, and planks constant

state what each symbol means

Answer 27

E = hf

E= energy og photon (J)
f = frequency of radiation (Hz)
h = planks constant

Question 28

what equation links energy, planks constant, speed of light and wavelength

state what each symbol means

Answer 28

E = hc / λ

E = energy of photon (J)
h = planks constant
c= speed of light in a vaccum
λ = wavelengh in Em spectrum

Question 29

what is annihilation

Answer 29

When a particle meets its corresponding antiparticle they both are destroyed and their mass is converted into energy in the form of two gamma-ray photons

Question 30

what are the two most common particle-antiparticle pairs that are seen

Answer 30

-Proton-antiproton annihilation

-Electron-positron annihilation

Question 31

how many photons are produced in annihilation and how is energy conserved

Answer 31

2 photons are produced which travel in opposite directions to conserve momentum

Question 32

annihilation equation

state the units

Answer 32

E min = hf min = E#

E min = minimum energy of one of the photons produced (J)
h = Planck’s Constant (J s)
f min = minimum frequency of one of the photons produced (Hz)
E = rest mass energy of one of the particles (J)

Question 33

what is pair production

Answer 33

When a photon interacts with a nucleus or atom and the energy of the photon is used to create a particle–antiparticle pair
(you get equal amounts of matter and antimatter)

Question 34

pair production equation

state the units

Answer 34

Emin = hfmin = 2E

Emin = minimum energy of the incident photon (J)

h = Planck’s Constant (J s)

fmin = minimum
frequency of the photon (Hz)

E = rest mass energy of one of the particles (J)