The ingression into nature of the delusive sense-object is conditioned by the adaptation of bodily events to the more normal occurrence, which is the ingression of the physical object.
A perceptual object is a physical object when (i) its situation is an active conditioning event for the ingression of any of its component sense-objects, and (ii) the same event can be the situation of the perceptual object for an indefinite number of possible percipient events.

Physical objects are the ordinary objects which we perceive when our senses are not cheated, such as chairs, tables and trees.

In a way physical objects have more insistent perceptive power than sense-objects.

Attention to the fact of their occurrence in nature is the first condition for the survival of complex living organisms.

The result of this high perceptive power of physical objects is the scholastic philosophy of nature which looks on the sense-objects as mere attributes of the physical objects.