Which list shows the colours present in the visible spectrum in order of increasing frequency?
blue→green→yellow→orange\text{blue} \rightarrow \text{green} \rightarrow \text{yellow} \rightarrow \text{orange}blue→green→yellow→orange
orange→yellow→green→blue\text{orange} \rightarrow \text{yellow} \rightarrow \text{green} \rightarrow \text{blue}orange→yellow→green→blue
yellow→green→orange→blue\text{yellow} \rightarrow \text{green} \rightarrow \text{orange} \rightarrow \text{blue}yellow→green→orange→blue
orange→green→yellow→blue\text{orange} \rightarrow \text{green} \rightarrow \text{yellow} \rightarrow \text{blue}orange→green→yellow→blue
12 exam-style questions on CIE IGCSE Physics 3.2.4 Dispersion of light. Each one has a worked solution and a mark scheme showing where the marks go.