How is the shadow of full milk bottle different to empty bottle?

The shadow of a full milk bottle will be darker and more opaque than the shadow of an empty milk bottle. Here's why:

* Light Absorption: Milk is opaque, meaning it absorbs light. When light shines on a full bottle, the milk inside absorbs a significant portion of the light, resulting in a darker shadow.

* Light Reflection: An empty bottle, especially if made of glass, reflects more light. This means less light is absorbed, leading to a lighter, less defined shadow.

Think of it this way:

* Full Bottle: The milk acts like a light blocker, making the shadow darker.

* Empty Bottle: The empty space allows more light to pass through, creating a lighter and more transparent shadow.

Other factors influencing the shadow:

* The material of the bottle: A thicker bottle might cast a more defined shadow than a thin one.

* The angle of the light source: The direction of the light will affect the shape and darkness of the shadow.

* The surface the shadow falls on: A light-colored surface will make the shadow appear darker than a dark surface.