What does Hertz mean on a tv?
If you’ve been walking through the local electronics store, or browsing HDTVs online (and I’m sure you have), you may have noticed a lot of attention being payed to “120 Hertz,” that is, the refresh rate of some newer model televisions. The refresh rate refers to the frequency with which the image on the screen is updated, or re-drawn. “120 Hertz” means that the image you are looking at on the HDTV is updated 120 times a second.