FROSTS
Mark Mazer (Tue, 13 Nov 2007 06:44:19 PST)
this is heated up by sunshine which
acts through the frost as a magnifying lens
The focal point of the frost crystal would be nowhere near the surface of the leaf, thus, no heat. This is the reason that the old wive's tale about water drops heating up and damaging foliage is bogus.
Mark Mazer
Hertford, NC
Zone 7B-8 I think