Homework:
Basic Wave Properties
Act 5A, p,53, Pulses and Waves
Ex 3D, p.66--67, Wave Properties
Ex 3F, p.3F, p.73-75 Superposition
Act 5B, p. 58, Reflection, Refraction and Diffraction of Waves
Act 5C, p.63-64, Diffraction and Superposition
Young’s Double Slit Experiment
Ex 3B, p. 47-52, Refraction
Ex 3E, p.69-70, Diffration
Ex 3G, p.76-78 Two Point Source Interference
Ex 3H, p.81-83 Waves on a String
Ex 3I, p.85-87 Wave Refraction on a String
Diffraction
- The Bending of Waves Around Corners
- Larger Wavelength, 𝛌 - greater the angle of diffraction
- Shorter Wavelength, 𝛌 - smaller the angle of diffraction
- Also the smaller the gap the greater the angle of diffraction
Diffraction
Two Point Source Interference
Diffraction of Water Waves in a Ripple Tank
Two Point Source Interference
Two Point Source Interference
Double Slit Experiment
Cymatics
Cymatics
Cymatics: Hose Pipe Water Experiment
Singing plates - Standing Waves on Chladni plates
Cymatics: Ruben's Tube Vs. Tesla Coil
Sound + Fire = Rubens' Tube
A better description of resonance
Snell's Law & Critical Angle
The Critical Angle occurs when a wave is attempting to pass from a medium with a slower speed to that of a higher speed
low v → higher v
low 𝜆 → higher 𝜆
high n → lower n
The Critical angle is the incident angle where the refracted angle equals 90 degrees
- Any incident above the Critical angle will prevent any refraction occuring and Total Internal Reflection will occur
- The Critical angle is can be found by sin(𝜭c) = n2/n1
FibreOptic Cables: How they work?
Total Internal Reflection T.I.R.
What Happens to Lazers Underwater?
