Unit 4 Description
In this unit, you will explore the fascinating dual nature of light-both as a wave and as a particle - and examine how this understanding has shaped modern physics. You will begin by analyzing the behaviour of light using the wave model to explain reflection, refraction, diffraction, and interference. You will then investigate evidence supporting the particle model, including the photoelectric effect and photon theory.
You will use mathematical tools and laboratory investigations to deepen your undertanding of wave-particle duality and how it applies to electromagnetic radiation. This unit lays the foundation of quantum physics and introduces students to the idea that classical models of light are limited in scope.
Big Ideas:
- Light exhibits both wave-like and particle-like behaviours.
- The dual nature of light is essential to understanding phenomena in modern physics.
- Models of light help explain and predict the behaviour of electromagnetic radiation in various contexts.
Key Topics:
- Properties of waves and wave behaviour (interference, diffraction)
- Reflection and refraction (Snell's Law)
- Polarization
- The electromagnetic spectrum
- The photoelectric effect and evidence for the particle nature of light
- Wave-particle duality and its implications in modern physics
Skilled Developed:
- Applying wave principles to analyze and predict the behaviour of light
- Using geometric and physical optics to solve problems
- Conducting investigations related to wave interference and refraction
- Explaining experimental evidence for the photoelectric effect
- Connecting theoretical physics to real-world applications and technologies
Overall Expectations (Ontario Curriculum SPH4U):
D1. Analyse, and propose explanations for, optical phenomena using the wave model of light, and assess the contributions of optical technologies to society and the environment.
D2. Investigate, in qualitative and quantitatve terms, the propterties of waves and light, and solve related problems.
D3. Demonstrate an understanding of the wave model of light and describe light as a part of the electromagnetic spectrum.