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CSCA PhysicsChapter 4: OpticsBeginner

Geometrical Optics: Reflection, Refraction & TIR

几何光学:光的反射、折射与全反射 · Node 4.1

Laws of reflection, Snell's law of refraction, refractive index, critical angle, and total internal reflection.

Chapter Weight: 10% of official examination
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Core Mathematical Axiom

Formula Proof & Traps
θr​=θi​,n1​sinθ1​=n2​sinθ2​,sinC=n1​n2​​=n1​
CSCA Exam Trap Alert

Attempting to find a critical angle for total internal reflection when light enters an optically denser medium from air.

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Physical Optics: Interference & Diffraction