White light’s spectrum is composed of seven colours. Fig. 7.1 shows a spectrum that is only partly finished. The labelled boxes read, from left to right: violet, indigo, [blank], green, [blank], orange, red. A blank box appears below the spectrum.
(a(i))[2]
In Fig. 7.1, fill in the missing colour name in each empty box.
(a(ii))[1]
For Fig. 7.1, show the direction in which wavelength increases in the spectrum. Draw an arrow in the box beneath the spectrum of colours.
(b(i))[2]
On Fig. 7.2, sketch the path of the ray as it moves through the glass prism and then enters the air.
(b(ii))[1]
State the term that describes what happens to the ray of red light as it enters and leaves the prism.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Blue in the gap between indigo and green” …