# ghost1

> The tail ghost vertex. A ghost vertex is used by the solver to define how a collision response should be handled when a contact with the vertex occurs.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public Vector2 ghost1 { readonly get; set; }
```