- Ex 3C, p. 56-63 Lens
- Ex 3A, p. 37-44 Curved Mirrors
Note: diverging lens & mirror have a negative focus
Ray Diagrams
Plane & Curved Mirrors
Tuesday, 4 July 2017
Tuesday, 20 June 2017
Term 2 Week 8 2017
Homework
- Ex 3C, p. 56-63 Lens
Convex (Converging) vs
Concave (Diverging) Lens
Convex Lens - Converging Lens
Ray Diagrams
Wednesday, 14 June 2017
Term 2 Week 7 2017
Homework
- Ex 5A, p. 151-155, Models of the Atom
- Ex 5B, p. 160-171, Radioactivity
- Ex 5C, p. 175-182, Nuclear Reactions
- Practice Assessment
Atomic & Nuclear Physics Assessment, Phy 2.5 AS 91172, next Monday
The pre-aligned Standard Covering:
- Historical models of the Atom;
- Half-Life;
- but not Nuclear Reactions
90256 Demonstrate understanding of atoms and radioactivity 2009 - Questions - Answers
90256 Demonstrate understanding of atoms and radioactivity 2010 - Questions - Answers
Term 2 Week 6 2017
Homework
- Ex 5A, p. 151-155, Models of the Atom
- Ex 5B, p. 160-171, Radioactivity
- Ex 5C, p. 175-182, Nuclear Reactions
Chem/Phy Canterbury Field Trip this Thursday-Friday
Nuclear Reactions:
- Conservation of Atomic Number
- Conservation of Nucleon Number
- Conservation of Mass-Energy E = Δmc2
E = Δmc2
Nuclear Fusion in the Sun
Binding Energy comes from the change in mass from individual nucleons to being combined into a nucleus. This is energy lost by the nucleons joined together in a nucleus and must be returned in order to separate the nucleons
E = Δmc2
Mass Energy Equivalence
Nuclear Reactions
Fission Fusion and Radioactive Decay
Fission & Fusion
Sunday, 28 May 2017
Term 2 Week 5 2017
Homework
- Ex 5A, p. 151-155, Models of the Atom
- Ex 5B, p. 160-171, Radioactivity
Half-Life Exponential Formula
Half-Life Example Calculation
Half-Life Calculations: Radioactive Decay
Sunday, 21 May 2017
Term 2 Week 4 2017
Homework
- Ex 5A, p. 151-155, Models of the Atom
- Ex 5B, p. 160-171, Radioactivity
History of the Atom
Models of the Atom
Thomson's Plum Pudding Model
Rutherford's Gold Foil Experiment
Parts of the Atom
Isotopes
Isotopes are versions of an atom or an element that have the same number of protons, but different numbers of neutrons
What are Isotopes?
Radioactive Decay
Alpha, Beta & Gamma Radiation
- Alpha particles are emitted by a larger nucleus that has too many Protons
- Beta particles are emitted by a nucleus that has too many Neutrons
- Gamma photons are emitted by a nucleus that has too much Energy (is in an exited state)
Alpha Decay
Beta Decay
Radiation
Types of Radiation
Is radiation dangerous?
The Most Radioactive Places on Earth
Millisieverts and Radiation - Sixty Symbols
Half Life
Nuclear Half Life: Intro and Explanation
Nuclear Half Life: Calculations
Monday, 15 May 2017
Term 2 Week 3 2017
Homework
Two Point Source Interference
- Ex 3D, p.66--67, Wave Properties
- Ex 3E, p.69-70, Diffration
- Ex 3F, p.73-75 Superposition
- Ex 3G, p.76-78, Two Point Source Interference
- Ex 3H, p.81-81, Reflection
Reflection on A String
Hard Boundary
Wave reflects on opposite side (opposite phase)
Reflection on A String
Soft Boundary
Wave reflects on same side (same phase)
Refraction on A String
Fast to Slow Boundary
Relation of waves to Incident Wave
Reflected Wave - same speed - same wavelength - opposite phase
Refracted Wave - slower speed - smaller wavelength - same phase
Refraction on A String
Slow to Fast Boundary
Relation of waves to Incident Wave
Reflected Wave - same speed - same wavelength - same phase
Refracted Wave - faster speed - larger wavelength - same phase
Diffraction
The Bending of Waves Around Corners
- Larger Wavelength - greater the angle of diffraction
- Shorter Wavelength - smaller the angle of diffraction
- Also the smaller the gap the greater the angle of diffraction
Diffraction of Water Waves in a Ripple Tank
Two Point Source Interference
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