Chapter 1-5 (Revision)

Question 1

Time Dilation

Answer 1

The phenomena that the time of fast moving objects looks slower for the rest person.

Question 2

Lorentz Contraction

Answer 2

The phenomena that the space looks shrinking for the fast moving object

Question 3

Heinsberg’s Uncertainty Principle

Answer 3

This states momentum and position, or energy and time cannot be measured precisely, simultaneously.

Question 4

Pauli’s Exclusion Principle

Answer 4

States that 2 same fermions cannot occupy the same state.

Fermions: A particle that follows Fermi-Diracstatistics. These particles obey the Pauli’s Exclusion Principle.

Question 5

Nuclear Fission

Answer 5

A nuclear reaction in which a heavy nuclear splits spontaneously or on impact with another particle, with the release of energy.

Question 6

Match the sentences which corresponds to its function in a nuclear fission reactor.

“This absorbs neutrons and controls the speed of nuclear fission, or stops it in an emergency.”

(a) Nuclear fuel (b) Generator (c) Coolant
(d) Moderator (e) Control rod

Answer 6

(e) Control rod

Question 7

Match the sentences which corresponds to its function in a nuclear fission reactor.

“This is made by an element which causes nuclear fission.”

(a) Nuclear fuel (b) Generator (c) Coolant
(d) Moderator (e) Control rod

Answer 7

(a)Nuclear fuel

Question 8

Match the sentences which corresponds to its function in a nuclear fission reactor.

“This transfers the heat from the core to the outside to generate electricity.”

(a) Nuclear fuel (b) Generator (c) Coolant
(d) Moderator (e) Control rod

Answer 8

(c) Coolant

Question 9

Match the sentences which corresponds to its function in a nuclear fission reactor.

“This slows down neutrons so that nuclear fission can continue in the core.”

(a) Nuclear fuel (b) Generator (c) Coolant
(d) Moderator (e) Control rod

Answer 9

(d) Moderator

Question 10

Match the sentences which corresponds to its function in a nuclear fission reactor.

“This generates electricity by the steam made by the heat transferred from the core.”

(a) Nuclear fuel (b) Generator (c) Coolant
(d) Moderator (e) Control rod

Answer 10

(b) Generator

Question 11

Name 3 Hadrons

Answer 11

Proton, neutron, pion.

Question 12

Name 3 leptons

Answer 12

Electron, electron neutrino
Muon, muon neutrino
Tauon, tau neutrino

Question 13

Name 3 gauge bosons.

Answer 13

Photon
Weak boson (W-boson, Z-boson)
Gluon

Question 14

Special Relativity

Answer 14

The laws of physics are the same in all inertial frames, and the speed of light is the same for all observers

Question 15

General Relativity

Answer 15

Theory of space and time. Central idea is that general relativity is that space and time are two aspects of spacetime.

Spacetime is curved when there is gravity, matter, energy and momentum.

Question 16

• Amplitude of waves

- Wavelength

Answer 16

• The maximum amount of displacement of a particle on the medium from its rest position.
• The distance from crest to crest, or trough to trough.

Question 17

Phase in waves.

Answer 17

Concept of wave like the phase of the moon. (Full, Gibbous, Crescent, New).

Question 18

Principle of superposition

Answer 18

They can simply be added. They are waves whenever two(or more) waves travelling through the same medium at the same time.

Question 19

Wave interference

Answer 19

A phenomenon inside which two waves super pose to form a resultant wave of greater, lower or the same amplitude.

Question 20

Diffraction of waves.

Answer 20

The spreading of waves around obstacles. Diffraction takes place with the sound; with the electromagnetic faction, such as light, X-rays and gamma rays.

With small moving particles such as atoms, neutrons and electrons.

Question 21

Schrodinger’s equation

Answer 21

Describes the form of the probability waves that govern the motion of small particles, and it specifies how these waves are altered by external influences.

Question 22

Order from small to large.

(a) Length of an E-Coli
(b) Planck Length
(c) Diameter of an electron cloud of a hydrogen atom
(d) Diameter of a nucleon
(e) Diameter of a carbon nucleus

Answer 22

b, d, e, c, a,

Question 23

Choose one not a unit of energy.

Joule, Entropy, Electronvolt, Calorie

Answer 23

Entropy

Question 24

Copenhagen interpretation

Answer 24

A quantum particle doesn’t exist in one state or another, but in all of its possible states at once.

This explains by a quantum particle behaves erratically.

Question 25

Quantum Tunnelling

Answer 25

The quantum mechanical phenomenon where a subatomic particle passes through a potential barrier.

Question 26

Quantum Teleportation

Answer 26

Process in which quantum information can be transmitted from one location to another.

With the help of classical communication and previously shared quantum entanglement between the sending and receiving location.