It’s not quite so simple, there are special conditions when the visibility changes:
Some radio waves, depending on the frequency, are also typically limited by the curvature of the Earth, but the local weather conditions change that from time to time. Radio amateurs have a lot of fun using these conditions.
Rijn Muntjewerff's Holland TV DX Antenna Array.home.iprimus.com.au
I’ve made myself some unexpected receptions just with the home TV antenna, long ago, as the TV was all analog.