apparent horizon

The brain interprets the line nearer the apparent horizon as farther away and therefore longer than the other identical line.

Rather than being shrouded by a true, eternal event horizon, the event would be concealed by a temporary 'apparent horizon', says Rovelli.

Information can rise from inside the black hole to the apparent horizon.

In that case, the event horizon would, in theory, become smaller than the apparent horizon.

It is either true or apparent; true when measured from the rational or real horizon, apparent when from the sensible or apparent horizon.