Introduction:

Shadows are formed when an object blocks light from a source and creates an area of darkness behind it. Not all objects have the ability to cast shadows. Let's explore the types of objects that can cast shadows.

Explanation:

1. Transparent objects:

Transparent objects allow light to pass through them without significant obstruction. As a result, they do not cast shadows. Examples of transparent objects include glass, water, and air.

2. Opaque objects:

Opaque objects are the ones that block light completely or to a large extent. These objects do not allow light to pass through them, creating a shadow behind them. Opaque objects are capable of casting shadows because they absorb or reflect light. Examples of opaque objects are wood, metal, and plastic.

3. All types of objects:

Not all objects can cast shadows. Transparent objects do not cast shadows as light passes through them, while opaque objects block the light and create shadows. Therefore, the statement that all objects can cast shadows is incorrect.

4. Only heavy objects can cast shadows:

The weight of an object does not determine whether it can cast a shadow or not. Shadows are formed when an object blocks light, regardless of its weight. Therefore, the statement that only heavy objects can cast shadows is incorrect.

Conclusion:

The correct answer is option 'B' - Opaque objects can cast shadows. Opaque objects block or absorb light, preventing it from passing through and creating shadows. Transparent objects, on the other hand, allow light to pass through them, resulting in no shadow formation.