Unit 8 of 8Gatekeeper unitGrade 11
Extension
Work through these 9 topics in order. Clear the gatekeeper and the rest of the course opens up.
01
Reflection & Plane Mirrors
The law of reflection.
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02
Curved Mirrors
Concave and convex mirror images.
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03
Refraction & Snell’s Law
Bending light and total internal reflection.
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04
Lenses & the Human Eye
Forming images with lenses.
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05
Frames of Reference & Postulates
Einstein’s two postulates.
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06
Time Dilation & Length Contraction
Moving clocks and rulers.
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07
Mass–Energy Equivalence
E = mc² and relativistic momentum.
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08
Radioactivity, Isotopes & Half-Life
Radioactive decay and dating.
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09
Fission, Fusion & Reactors
Releasing nuclear energy.
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