18. Based on the colors of light, what color comes between red and yellow?
D. violet C. orange
A. indigo B. green

19. Which of the following colors of light bend the most?
A. indigo C. orange
B. violet D. green

20. A second prism will change a spectrum back into white light. What does it show
A. Prism distort image.
B. Prisms are transparent.
C. Light travels at a constant speed.
D. White light is composed of colors.​