Some ideas for possible questions...
1) Describe an experiment you could do, including the measurements you would need to take, to determine the refractive index of a transparent block.
2) Compare the similarities and differences between images formed by a magnifying glass and a diverging lens.
3) Describe the factors which affect the focal length of a lens and explain how the lenses in modern glasses can be manufactured to be very thin.
4) Describe an experiment that could be carried out to determine the critical angle of a glass block.
5) Explain how total internal reflection occurs. Why is total internal not possible if light is travelling in air towards a glass surface?
6) Explain how an endoscope works and it's uses in medicine.
Answers to follow shortly.
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