system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why the image of black and white television was so much sharper than the first several years of color television.
gpt
Cathode ray tube TVs worked by having an electron gun draw each line of the image, one by one, around 30 times a second.  The beam form the gun would strike a phosphor (think pixel), the strong the beam, the more brightly the phosphor glow.  By adjusting the power of the beam at just the right times, a moving image was created.

Color TVs use three electron guns, and each "pixel" consists of three phosphors.  That made the pixels larger, and less sharp to begin with.  Also, it could be difficult to keep the electron guns in adjustment.  With a B&W TV, the whole image would shift over a pixel, you wouldn't notice that much.  But with a color TV, two guns could be hitting adjacent (or worse) pixels when they should be aimed at the same one, which would also contribute to a less sharp picture.