Consequently, why do computer screens flicker on camera?
The image on-screen refreshes at a different rate from the number of frames per second the camera records. Most computer monitors refresh in a range from 60Hz-120Hz; cameras work at 50 frames per second. Because camera and monitor are out of sync, you record fewer images per second, hence the flicker.
Additionally, why do screens look weird at an angle? Thus, when you view a screen from a different angle, you are essentially changing the perceived size of the pixels. When you mess with the size and ambiguity of the colors, the color of your screen changes, because you can't as easily distinguish between the colors.
Also to know is, why can't cameras take pictures of screens?
In layman's term, it's because the frequncy at which CRT (Cathode Ray Tude) displays images on the laptop/TV screen is different than the frequency at which your camera take pictures. A single electron beam scans horizontal lines of pixels across the screen, lighting up each pixel when the beam hits it.
Do monitors have cameras?
Many modern laptops (and some desktop monitors) have a built-in webcam and microphone just above the screen. The distance between screen and webcam is quite small, so it isn't always obvious that neither party in a video chat is actually looking at the camera.
