Part $3$: Computer Screen Polarization

Look through one polarizing card at an illuminated computer screen such that the axis marked in Part $1$ is visible.

Note: The computer screen must not be black; open an Internet browser, program, or document if necessary.

Rotate the card until the computer screen reaches the dimmest point.

Take a photo of the card in front of the screen.

Use image$-$labeling software to draw and label a line on the photo parallel to the screen$$s polarization axis as shown in Figure $16.$ Upload the image in Photo $1.$