brainstorm question for light experiment

[trevorjohnson83]

AI threw this at me as a simple brainstorm,

Here’s a question you can test mentally—or even look up simple demos of:

If light is just a smooth wave shaped by a medium, why doesn’t very dim blue light act like strong red light when hitting a material?

What’s observed is:

• very dim blue → electrons come out
• very bright red → nothing happens

So the key issue isn’t “evidence I’m telling you”—it’s:

what mechanism would make color act like a hard switch, independent of intensity?