Visible means you can see it. The stars are visible on a clear night, a scar is still visible above his eyebrow, the sign is barely visible from the road.
It takes TO for the person and FROM for the place: visible to the naked eye, visible from the motorway. A second use is about attention rather than eyesight — a highly visible campaign, a visible minority, 'the chief executive needs to be more visible' — meaning noticed by the public. The noun is visibility, which weather forecasts use for how far you can see: poor visibility, visibility down to fifty metres. Its opposite, invisible, is one of the few in- words that everybody gets right. And visible means able to be seen, not being looked at, so a visible crack is there whether or not anyone is looking.
Visible came through Old French from Latin visibilis, 'that may be seen', built on videre, 'to see' — the verb behind vision, and further back the Indo-European root *weyd-. English already had a word of its own for this, ġesewenlīċ, and dropped it in favour of the Latin one, which is the story of a great deal of English vocabulary.
Proto-Indo-European
*weyd-
Latin
visibilis — that may be seen
Old French
visible
Middle English
visible
English, today
visible
From Middle English visible, from Old French visible, from Latin visibilis (“that may be seen”), from Latin videre (“to see”), past participle visus; see vision. Displaced native ġesewenlīċ.
Etymology from Wiktionary, CC BY-SA