The answer:
B. Sound
Explanation:
A. Water
- Water can fill a room, but it has mass and volume.
- It occupies physical space, so it doesn’t match the riddle.
C. Air
- Like water, air has mass and occupies space (even if we don’t see it).
- It takes up room, and we can measure its volume (e.g., in liters).
- So it does occupy physical space.
D. Light
- Light can fill a room, but it’s made of photons, and photons can be blocked (e.g., by walls or curtains).
- Light requires a source and direction — it doesn’t fully fill a room like the riddle suggests.
- Also, light behaves as both particle and wave, but it can still be blocked or absorbed, so it doesn’t always “fill” a room in the sense the riddle implies.
B. Sound
- Sound is a vibration that travels through air (or other mediums).
- It can fill a room completely when it’s loud or echoing.
- But sound has no mass or physical volume — it does not occupy physical space.
- You can hear it, but you can’t see or touch it.
Question: I fill the entire room, yet I ocuppy no phisical space. what am I?
