We were watching a light show that had a bunch of spotlights the other night (Ocean Cay lighthouse show if anyone is curious). The four beams on the right side of the lighthouse (as seen in the photo) just suddenly ended after some distance as shown in the second photo. What causes this? I would have expected the light to fade gradually to nothing.
Note that it looked exactly like this to the naked eye — the phone did a fantastic job of capturing what I was seeing.
Sorry – I couldn’t figure out how to post these directly to this sub, but it requires a visual depiction to understand – here are the pics:
[https://imgur.com/a/h2iICLC](https://imgur.com/a/h2iICLC)
[https://imgur.com/a/XyLvB6Q](https://imgur.com/a/XyLvB6Q)
In: Physics
Would that be the west side? It looks to me like the sun isn’t all the way down and the spotlights are hitting the edge of the shadow, where there’s light stronger than they are, so they’re no longer visible as the strongest beam of light.
That’s not the lights. That’s the edge of a very sparse cloud. The very bright light from the lighthouse makes the cloud visible. When the beam reaches the end of the cloud, it finds clear air and you can’t see the beam any more. When you see a beam that’s not pointed at you, you’re seeing scattering of the beam by something it’s passing through.
A beam of light is only visible when it bounces off something into your eyes. Some of the light was bouncing off some fog into your eye. Once the light got past the fog, there wasn’t anything for it to bounce off of, so you couldn’t see it.
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