Light and heat are both forms of radiant energy. Naturally light can vaporise water. It's not as powerful* as heat but that just means you need more of it.
* There is a formula which involves energy and the frequency of electromagnetic radiation. You could Google for it.
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[ 2.5 ms ] story [ 21.6 ms ] thread* There is a formula which involves energy and the frequency of electromagnetic radiation. You could Google for it.