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| style="height:20px; width:300px; text-align:center;" |A [[Water Wave|water wave]] has a [[wavelength]] of 1.6m and a frequency of 1.5Hz. Calculate the [[speed]] of the [[wave]].
| style="height:20px; width:300px; text-align:center;" |A ray of [[ultravoiletultraviolet]] [[light]] with a [[frequency]] of 7.5x10<sup>14</sup>Hz and [[wavelength]] of 0.30μm in an [[Optical Fibre|optical fibre]]. Calculate the [[speed]] of the [[wave]] through that [[Optical Fibre|optical fibre]] correct to 2 [[Significant Figures|significant figures]].
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| style="height:20px; width:300px; text-align:left;" |'''1. State the known quantities'''