* Theoretically, light can travel infinitely far. In a vacuum, light travels at the speed of light (approximately 299,792,458 meters per second) and wouldn't stop.

* Practically, there are limitations. The light from a flashlight will eventually become too faint to see. Here's why:

* Spread: The light from a flashlight spreads out as it travels. This means the intensity of the light decreases as it gets further away.

* Absorption: Light can be absorbed by particles in the air, dust, fog, or even the molecules of the air itself. The more particles there are, the more light is absorbed.

* Scattering: Light can also be scattered by particles in the air, changing its direction and further reducing its intensity.

So, how far can you *see* the light from a flashlight? It depends on several factors:

* The power of the flashlight: A more powerful flashlight will produce a brighter beam that can travel farther.

* The clarity of the air: Clear, dry air will allow light to travel farther than foggy or hazy air.

* Your eyes: Your eyes have a limited ability to detect faint light.

In general, a flashlight beam might be visible for a few hundred meters (a few football fields) in good conditions. But it can be much less in poor conditions.