On Vision and Colors are, however, nonessential properties that differ according to the type of light-refracting substance that is used. The top of the upper image is violet. Below the violet is blue. The bottom of the lower image is orange. Above the orange is yellow. In this way, along with the white disk and the black background, four prismatic colors appear: violet, blue, yellow, and orange. This is in disagreement with Newton's claim that there are seven prismatic colors. As the upper image overlaps black, it is seen as violet. Where it overlaps white, it is seen as blue. As the lower image
When I Consider How My Light is Spent was responsible in the Commonwealth government. However, the references to light and darkness in the poem make it virtually certain that Milton's blindness was at least a secondary theme. The sonnet is in the Petrarchan form, with the rhyme scheme a b b a a b b a c d e c d e, as can be seen in the text below. When Milton writes "that one talent which is death to hide" he is specifically alluding to the parable of the talents in the Gospel of Matthew. When I Consider How My Light is Spent "When I Consider How