| Depending on
what browser you're using, when you hit the refresh or reload
button, your computer will bring up the same page you're looking at
with updated information on it.
In a computer display, to
refresh is to redraw the image information from memory. Computer or
television displays have to be refreshed because they don't have the
capacity to hold a stable image. Electron guns in the cathode ray
tube (CRT) constantly sweep across the screen, redrawing the
display. The RAMDAC (random access memory digital-to-analog
converter) in the graphics card determines a refresh rate: how many
times per second the information will be drawn and the image
repainted. At adequate refresh rate levels, a display appears
stable, but if a refresh rate is too low a display will flicker and
can cause eye strain and headaches. |
