Course review
Review each learning objective in this topic, then open its concept explanation or question set.
Learning objective
• Waves travelling in two and three dimensions can be described through the concepts of wavefronts and rays.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Snell’s law: n1 sinθ1 = n2 sinθ2.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Refractive index: n=c/v.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Total internal reflection condition uses critical angle: sinθc=n2/n1.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Superposition adds displacements where waves overlap.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Coherence requires constant phase difference between waves.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Path difference determines constructive or destructive interference.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Two-source interference depends on path difference and wavelength.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Young double-slit spacing: s = λD/d.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Explain wave behaviour at boundaries in terms of reflection, refraction and transmission. • Sketch and interpret incident, reflected and transmitted wavefronts and rays at normal or oblique incidence within the syllabus guidance.
Start with the concept explanation, then practise to create mastery evidence.
Learning objective
• Explain diffraction around a body and through an aperture. • Use wavefront–ray diagrams to represent diffraction, and relate greater spreading qualitatively to wavelength and aperture size.
Start with the concept explanation, then practise to create mastery evidence.