system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the beam of the flashlight fade out after a few meters typically, when the light travels much farther?
gpt
The beam gets wider as it gets farther from the flashlight, so you have the same amount of light being spread over a larger and larger area. Eventually it gets spread so thinly that your eyes can’t tell the difference.