Matt used a camera to take a picture of a rose on a piece of paper. In the picture, the rose appeared to be bright red, and the background appeared to be white. Then Matt placed a blue glass filter over the camera lens and took another picture. In this picture, the rose appeared to be
black, and the background appeared to be blue.

Explain what happened to the light waves to make the appearance of the rose and the appearance of the background different in the two pictures.