# bounciness

> The bounciness used by the Collider2D.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public float bounciness { get; }
```

### Remarks

A [Collider2D](/engine/6000.0/script-reference/unityengine/collider2d.md) can be assigned a [PhysicsMaterial2D](/engine/6000.0/script-reference/unityengine/physicsmaterial2d.md) either directly via to the [Collider2D.sharedMaterial](/engine/6000.0/script-reference/unityengine/collider2d/sharedmaterial.md), indirectly via the attached [Rigidbody2D.sharedMaterial](/engine/6000.0/script-reference/unityengine/rigidbody2d/sharedmaterial.md), the global default or if no [PhysicsMaterial2D](/engine/6000.0/script-reference/unityengine/physicsmaterial2d.md) is assigned then a default value is used.

Additional Resources: [PhysicsMaterial2D](/engine/6000.0/script-reference/unityengine/physicsmaterial2d.md), [PhysicsMaterial2D.bounciness](/engine/6000.0/script-reference/unityengine/physicsmaterial2d/bounciness.md)