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HSC Physics

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  1. Module 1: Kinematics
    1.1 Motion in a Straight Line
  2. 1.2 Motion on a Plane
  3. Module 2: Dynamics
    2.1 Forces
  4. 2.2 Forces, Acceleration and Energy
  5. 2.3 Momentum, Energy and Simple Systems
  6. Module 3: Waves and Thermodynamics
    3.1 Wave Properties
  7. 3.2 Wave Behaviour
  8. 3.3 Sound Waves
  9. 3.4 Ray Model of Light
  10. 3.5 Thermodynamics
  11. Module 4: Electricity and Magnetism
    4.1 Electrostatics
  12. 4.2 Electric Circuits
  13. 4.3 Magnetism
  14. Module 5: Advanced Mechanics
    5.1 Projectile Motion
  15. 5.2 Circular Motion
  16. 5.3 Motion in Gravitational Fields
    2 Topics
  17. Module 6: Electromagnetism
    6.1 Charged Particles, Conductors and Electric and Magnetic Fields
  18. 6.2 The Motor Effect
    1 Topic
  19. 6.3 Electromagnetic Induction
  20. 6.4 Applications of the Motor Effect
    1 Topic
  21. Module 7: The Nature of Light
    7.1 Electromagnetic Spectrum
    3 Topics
  22. 7.2 Light: Wave Model
  23. 7.3 Light: Quantum Model
    2 Topics
  24. 7.4 Light and Special Relativity
  25. Module 8: From the Universe to the Atom
    8.1 Origins of the Elements
    5 Topics
  26. 8.2 Structure of the Atom
    3 Topics
  27. 8.3 Quantum Mechanical Nature of the Atom
    2 Topics
  28. 8.4 Properties of the Nucleus
    2 Topics
  29. 8.5 Deep Inside the Atom
    4 Topics
Lesson 23, Topic 1
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Comparing Models of Light

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Classical (Wave) ModelPhoton (Particle) Model
Light is an electromagnetic wave.Light is a stream of particles called photons.
Displays properties of reflection, refraction, diffraction, interference and polarisation.Behaves like a particle when absorbed or emitted (or scattered) by an electron.
Energy of light is evenly distributed across its wavefronts and depends on light intensity.Light energy is localised to each photon and depends on the frequency, according to E=hf

The following table compares different behaviours of light and whether each of the models is able to adequately explain them.

PhenomenonExplained by Wave Model?Explained by Particle Model?
ReflectionYesYes
RefractionYesYes
DiffractionYesNo
InterferenceYesNo
PolarisationYesNo
Blackbody spectrumNoYes
Photoelectric effectNoYes