Homework:
Basic Properties of Waves
- Act 5A, p,53, Pulses and Waves
- Ex 3D, p.66--67, Wave Properties
Superposition & Diffraction
- 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
- Ex 3E, p.69-70, Diffration
- Ex 3H, p.81-83 Waves on a String
Young’s Double Slit Experiment
- Ex 3B, p. 47-52, Refraction
- Ex 3G, p.76-78 Two Point Source Interference
Reflection, Refraction and Diffraction
- Act 5B, p. 58, Reflection, Refraction and Diffraction of Waves
- Act 7A, p.83-84, Refraction of Light
- Act 7B, p.86, Critical Angle
- Act 7C, p.87, Prisms
- Ex 3B, p. 47-52, Refraction of Light
- Ex 3I, p.85-87 Wave Refraction on a String
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?
