1.1 Explain the nature of the image formed by a plane mirror
2.1 Use Snell’s Law to calculate angle of refraction.
3.1 Calculate the power of convex and concave lenses from their focal lengths.
4.1 Identify the corrective lens required for short and long sight and explain the process.
5.1 Explain models of the movement of light and sound wave.
6.1 Use the concept of frequency in explaining the detection of sound waves by the inner ear.

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