hi i'm currently in yr 12 in my first year of the IB diploma studying higher physics. i have chosen to complete my 4000 wrd essay in this subject, but i cant think of a suitable research question. The essay can either be a simple written essay or an investigation/experiment. i would like to do it on the topic of 'waves' but any suggestions are welcome some examples: -does the frequency of light affect the resolution of the eye -can background radiation be reduced by screening -wind power: a clean source of energy? please, any physics-related ideas are much appreciated!