Andy Dingley wrote:

I was pondering this strange behaviour of UV light, and why it has to
be of a certain minimum wavelength to have any effect

Isn;t it just a photon energy threshold? Above a certain wavelength, the
photon energy isn't enough to kick the appropriate electron, below that
wavelength it is?

when I began to
invent a fascinating new theory, which this posting is sadly too small
to contain...


All ears.

--
Grunff