Mattar And Antimatter

Question 1

What is an Alpha Particle?

Answer 1

A Particle made up of two protons and two neutrons.

Question 2

What is the equation for beta minus decay?

Answer 2

A A. 0. _
X ——-> W + ß + ve
Z Z+1. -1

Question 3

What is the equation for beta plus decay?

Answer 3

A A. 0.
X ——-> W + ß + ve
Z Z-1. +1

Question 4

What are the seven regions of the electromagnetic spectrum in order of increasing frequency?

Answer 4

Radio waves, micro waves, inflated radiation, visible light, ultra violet,x-rays and gamma rays.

Question 5

What is the speed of all types of electromagnetic radiation?

Answer 5

The speed of light which is 3.00*10^8

Question 6

What name is given to the discrete packets of quanta that electromagnetic radiation is released in?

Answer 6

Photons

Question 7

What is the equation that links photon energy and photon frequency?

Answer 7

E=hf

Question 8

What is the value and unit of Planck’s constant?

Answer 8

6.63x10^-34 Js

Question 9

What is the formula that links wavespeed, frequency and wavelength?

Answer 9

f=c/λ

Question 10

What are the symbol and relative charge of an anti proton?

Answer 10

Symbol is _
p

Relative charge is -1

Question 11

What are the symbol and relative charge of an antineutron?

Answer 11

Symbol: _
n

Relative charge of 0

Question 12

What are the symbol and relative charge of a positron?

Answer 12

Symbol: e+

Charge of +1

Question 13

What is meant by the rest mass of a particle?

Answer 13

The rest mass of a particle is the mass of the particle when stationary.

Question 14

How do the rest masses of a particle and its antiparticle compare?

Answer 14

They are identical to each other

Question 15

What is the law of conservation of energy?

Answer 15

Energy can not be created if destroyed it can only be converted into other forms.

Question 16

Which (extremely famous) equation links energy and mass?

Answer 16

E=mc^2

Question 17

What is meant by the rest energy of a particle?

Answer 17

The energy due to the particle’s rest mass.

Question 18

What are the usual units of rest energy?

Answer 18

Megaelectronvolts (MeV)

Question 19

What is pair production?

Answer 19

A process of converting energy to mass in which a gamma ray photon has enough energy to produce a particle-antiparticle pair.

Question 20

A diagram to show pair production.

Answer 20

.

Question 21

In pair production what must he minimum photon energy be?

Answer 21

The minimum photon energy must be at least equal to the minimum energy of the original particle.

Question 22

What is the result when a particle meets its antiparticle?

Answer 22

They annihilate each other and their mass gets converted to energy in the form of a pair of gamma ray photons

Question 23

How many photons are produced by annihilation?

Answer 23

A pair/ 2 photons are produced.