Electronics Puzzler: Artificial Vegitation Detector

By: Forrest M. Mims III
Vegitation Detector

Is it Fake or Real?

That's what many of us wonder when we see an attractive indoor plant. Intelligence specialists ask the same question when they wonder if an aerial image shows clumps of living vegetation or camouflage nets that might be concealing enemy fortifications or weapons.

Can you think of a way to determine if what appears to be vegetation really is?

Puzzler Hint:

The colors of light are those we can see.
Those we cannot see are the key.

Click here for the puzzler solution >>