As a look through the prism shows that one does not see white areas split evenly into seven colours, but rather one sees colours at some edge or light-dark border, he concluded that the spectrum is not a primary, but a compound phenomenon.
The spectrum is not a primary, but a compound phenomenon. He concluded this. One does not see white areas split evenly into seven colours, but rather one sees colours at some edge or light-dark border. A look through the prism shows this.