Term 3 Week 2 2016

Term 3 Week 2 2016
Homework:

• Ex 4, p.78-81, Standing Waves & Music
• Ex 5, p.96-99, Superposition (Two-Point Source & Multi-Point Source Interference) & The Doppler Effect

Two Point Source Interference

n𝜆 = dsin(𝛳)

Wave-Particle Duality Applied to the Double Slit Experiment

Diffraction Grating of White Light 

(Multi-Point Source Interference)

Green vs White Light Diffraction

Thin Film Interference

Making Colour with Holes

Visible Spectrum

Why Maths is Important to Understanding the Universe

Term 3 Week 1 2016

Term 3 Week 1 2016

Homework

• Ex 4, p. 78-81, Standing Waves & Music

Longitudinal Waves

Particle displacement in the medium is parallel to the direction of wave propagation e.g. sound waves, primary earthquake waves

Transverse Waves

Particle displacement in the medium is perpendicular to the direction of wave propagation e.g. light and other electromagnetic waves, secondary earthquake waves

Wave Speed

v = f𝜆

Superposition of Waves

Waves travel through each other and the total amplitude at any moment is equal to the sum of amplitudes of the individual waves.

Standing Waves

In musical instruments - when a reflected wave travels back through itself causing fixed points of Nodes (Deconstructive Interference) and Antinodes (Constructive Interference) due to the fractional relationship between the wavelength (𝜆) of the wave and the length (L) of the resonating chamber

Standing Waves on a String

1st Harmonic	2nd Harmonic	3rd Harmonic	4th Harmonic
𝜆 = 2L	𝜆 = L	𝜆 = ⅔ L	𝜆 = ½ L
f = f1st	f = 2f1st	f = 3f1st	f = 4f1st

Standing Waves in a Pipe

Standing Waves on a 2D Plate

Cymatics

Doppler Effect

the observed increase or decrease in frequency of waves (e.g. sound, light) due to the relative movement of the source of waves to the observer

f’ = f vw/(vw ± vs)

Term 2 Week 10

Homework

• Ex 3, p 60-64, Simple Harmonic Motion

Driven S.H.M. and Resonance

Resonance, Harmonic Motion, Oscillator - PhET

Waves - Beats

Two waves of similar but not equal wavelength (frequency) overlap with constructive and destructive interference.

The result are wave packets of Beat Frequency.

Beat Frequency = difference between two frequencies

Open two pages of the linked site Online Tone Generator to test beat frequencies yourself

Term 2 Week 9 2016

Homework

• Ex 3, p 60-64, Simple Harmonic Motion

S.H.M. Energy

Damped S.H.M.

Term 2 Week 8 2016

Lab Assessment is this week

Term 2 Week 7 2016

Homework:
Ex 13, p. 212 Lab Data and Errors - Lab Assessment is next week

Canterbury University Field Trip is this week 16th - 17th June 2016

Term 2 Week 6 2016

Homework

Make sure that you have completed:

• Ex 1, p.25-28, Translational Motion
• Q2, Handout, Lab Exercise

• Ex 2, p. 41-45, Rotational Motion

Reference Circle

Simple Harmonic Motion S.H.M.

Spring S.H.M.

Pendulum S.H.M.

Harmonic Pendulum