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AS Physics

Unit 1
Particles, Quantum Phenomena and Electricity

1 Constituents of the Atom

2 Particles and Antiparticles

3 Quarks

4 Hadrons

5 Leptons

6 Forces and Exchange Particles

7 The Strong Interaction

8 The Weak Interaction

9 Feynman Diagrams

10 The Photoelectric Effect

11 Excitation, Ionisation and Energy Levels…

Page 2

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Mechanics, Materials and Waves

1 Scalars and Vectors

2 Resolving Vectors

3 Moments

4 Velocity and Acceleration

5 Motion Graphs

6 Equations of Motion

7 Terminal Velocity and Projectiles

8 Newton's Laws

9 Work, Energy and Power

10 Conservation of Energy

11 Hooke's Law

12 Stress and Strain

13 Bulk…

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The Nuclear Model (Also seen in GCSE Physics 1 and 2)
We know from Rutherford's experiment that the structure of an atom consists of positively charged protons
and neutral neutrons in one place called the nucleus. The nucleus sits in the middle of the atom and has
negatively charged electrons…

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British Physicist Paul Dirac predicted a particle of equal mass to an electron but of opposite charge (positive).
This particle is called a positron and is the electron's antiparticle.
Every particles has its own antiparticle. An antiparticle has the same mass as the particle version but has
opposite charge.…

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To know the properties of each type of quark N. DWYER

Rutherford Also seen in GCSE Physics 2
Rutherford fired a beam of alpha particles at a thin gold foil. If the atom had no inner structure the alpha
particles would only be deflected by very small angles. Some of…

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To know what a hadron is and the difference between the two types
To know the properties common to all hadrons
To know the structure of the common hadrons and which is the most stable N. DWYER

Made from Smaller Stuff
Hadrons, the Greek for `heavy' are not…

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Unit 1
Lesson 5 Leptons
To be able to explain what a lepton is
To know the properties common to all leptons
To be able to explain the conservation laws and be able to use them N. DWYER

Fundamental Particles
A fundamental particle is a particle which is…

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There may be a clue to the charge of a particle; + , K
and e+ have a positive charge.
It will only have a baryon number if it IS a baryon. Mesons and Leptons have a Baryon Number of zero.
It will only have a lepton number if…

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In 1947 the exchange particle of the strong nuclear interaction were observed in a cloud chamber.
Lending Money Analogy
Think of making exchange particles in terms of lending somebody some money.
If you lend somebody £50 you would want it paid back fairly soon.
If you lend somebody 50p you…

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Neutrons ­ Nuclear Cement
In the lighter elements the number of protons and neutrons in the nucleus is the same. As the nucleus gets
bigger more neutrons are needed to keep it together.

Adding another proton means that all
the other nucleons feel the SNF
attraction. It also means that…




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