Final answer:
To avoid flicker in the television picture, interlaced scanning, synchronizing the video signal, and scanning odd lines first are used.
Step-by-step explanation:
In television, flicker can be avoided by using interlaced scanning. Interlaced scanning is a technique where the television screen displays the odd lines of the image first, followed by the even lines. This creates a more stable and flicker-free image for viewers.
Another way to avoid flicker is by synchronizing the video signal between the camera and monitor. This ensures that the timing of the video signal is consistent and eliminates any inconsistencies that could cause flickering.
Scanning the odd lines first, then the even lines also helps to reduce flicker. By scanning the lines in this order, the television creates a more consistent image with less flickering.