When you take a picture of a computer screen using your phone, why do those waves on the screen move as you zoom in/out?

Question

When you take a picture of a computer screen using your phone, why do those waves on the screen move as you zoom in/out?

In: Technology

Answer 1

Your phones capture rate is about thirty to 120 frames captured per second, depending on how expensive. Your monitor displays 30-144 frames per second, because of the computer refreshing at different times than your phone can capture, it creates lines that jump up and down on the monitor.

Televisions are typically ~30, which is the default for most cameras. This is why you can record your TV better.