Can Pure Water Fluoresce Under UV Light?

[B0b-A]

Can pure* water be made to fluoresce if illuminated by some particular frequency of Ultra-Violet light ?

[* No chemicals added ]

 

[rootone]

Sort of.
Not UV, but microwaves efficiently excite water molecules which then emit higher frequency electromagnetism (infra red)

 

[abbas_majidi]

I think it can. If incident UV light has wavelength about 10 nm. The majority of the materials absorbs this wavelength and translate it to heat, then they emit blackbody radiation. But I think blackbody radiation can't be fluorescent radiation .

 

[boneh3ad]

Do you count Cherenkov radiation as fluorescing?

 

[phinds]

I think it can. If incident UV light has wavelength about 10 nm. The majority of the materials absorbs this wavelength and translate it to heat, then they emit blackbody radiation. But I think blackbody radiation can't be fluorescent radiation .

And is 10nm in the UV range ? This question was specifically about incident UV radiation

 

[anorlunda]

See https://en.m.wikipedia.org/wiki/Sonoluminescence

 

[abbas_majidi]

And is 10nm in the UV range ? This question was specifically about incident UV radiation

Yes it is. EM wave with wavelength about 10 nm is called Extreme Ultra Violet.

 

[phinds]

Yes it is. EM wave with wavelength about 10 nm is called Extreme Ultra Violet.

Interesting. I've always thought of that stuff down there as X-rays. They ARE, but you are right that they are also called EUV (I was sure they were not UV). Weird that they have both defintions, but anyway, thanks for pointing that out to me.