See Invisibility

Level 2 Divination

Casting Time: 1 action
Range: Self
Components: V, S, M (a pinch of tale and a small sprinkling of powdered silver)
Duration: 1 hour

For the duration, you see invisible creatures and objects as if they were visible, and you can see into the Ethereal Plane. Ethereal creatures and objects appear ghostly and translucent.

Source: Player's Handbook, p. 274