No. As noted in the specifications, Ray connects to a TV via optical cable.
Your TV may well have Bluetooth, but connecting that way would be fraught with problems. Ray doesn’t have Bluetooth, so you’d need another Sonos unit which does, or use a separate BT receiver. In theory a BT receiver with an optical output could then feed the Ray but (a) the sound would be in stereo only, (b) the quality would be restricted by the BT codec, and (c) the audio would be significantly delayed, upsetting lip-sync with the TV picture.
As for ‘visible’ cables, a single-fibre optical connection can be as little as a couple of mm in diameter.