[profound (OP)]

What happens to water if you shine very intense light into water from a strobe flash unit.

The 1 liter of water will be in a highly reflective container 1 liter container and the light from a high intensity strobe light will flash from a xenon tube will flash into the ordinary water through an aperture  at the rate of 1 flash per second for 30 minutes.

I tried to google this but all the information seems to have been removed or irrelevant items come up.

I want to know if these pulses of light will do anything to the water.

[Bored chemist]

They will warm it up .

I doubt that anyone ever bothered to post that information on the web.
Why do you imagine that

the information seems to have been removed

?

[Bill S]

https://yourwatermatters.com/water-as-consciousness/

Even more fascinating are increasing new revelations that water is the medium of consciousness.

You could just annoy the hell out of it.

[alancalverd]

Visible light won't do anything but heat the water. However there is an oddity.

We like to use water to calibrate radiotherapy machines, since most of the human body is water and most of the damage done to the target cells is caused by free radicals generated in the aqueous cytoplasm by the ionising radiation. So several national standards laboratories built water calorimeters as the primary measurement standard. Obviously if you only have degassed distilled H2O in the tank, all the absorbed dose will resolve as heat because there are no other chemical endpoints.

We also built graphite calorimeters, using reactor-grade or pyrolytic graphite. Having one tenth of the specific heat capacity of water, they are a lot more sensitive and easier to stabilise, and despite the mess at Windscale, graphite does not suffer Wigner deformation under 1 - 10 MeV photon irradiation.

In my day, everyone was mystified by a consistent 3% discrepancy between the doses measured in graphite and water. That may not sound a lot, but (a) it's on the limit of acceptability for everyday clinical use, and therefore an embarrassment for a standards laboratory and (b) we knew all the contributory parameters (essentially, electrical power input, time, and temperature rise) to better than 0.01%. It seemed to me that water was undergoing some kind of persistent polymerisation.

I never found a more plausible answer. Does anyone out there know what was going on?

[profound (OP)]

Visible light won't do anything but heat the water. However there is an oddity.

We like to use water to calibrate radiotherapy machines, since most of the human body is water and most of the damage done to the target cells is caused by free radicals generated in the aqueous cytoplasm by the ionising radiation. So several national standards laboratories built water calorimeters as the primary measurement standard. Obviously if you only have degassed distilled H2O in the tank, all the absorbed dose will resolve as heat because there are no other chemical endpoints.

We also built graphite calorimeters, using reactor-grade or pyrolytic graphite. Having one tenth of the specific heat capacity of water, they are a lot more sensitive and easier to stabilise, and despite the mess at Windscale, graphite does not suffer Wigner deformation under 1 - 10 MeV photon irradiation.

In my day, everyone was mystified by a consistent 3% discrepancy between the doses measured in graphite and water. That may not sound a lot, but (a) it's on the limit of acceptability for everyday clinical use, and therefore an embarrassment for a standards laboratory and (b) we knew all the contributory parameters (essentially, electrical power input, time, and temperature rise) to better than 0.01%. It seemed to me that water was undergoing some kind of persistent polymerisation.

I never found a more plausible answer. Does anyone out there know what was going on?

I read once it can dissociate water molecules and generate ions in water and can help to sterilize water if a bottle is left in direct sunlight but the article seem to have been removed by internet censors.

[alancalverd]

Sunlight is a reasonable sterilant if there's nothing better. Many charities like Water Aid and Save the Children promote the use of Coke bottles and sunshine to debug drinking water. No sign of "suppression" that I can see, but a clean well is more convenient.   

[Bored chemist]

Does anyone out there know what was going on?

Well...

We also built graphite calorimeters, using reactor-grade or pyrolytic graphite. Having one tenth of the specific heat capacity of water

In the very real sense that 0.7 is a tenth of 4.2.

It's implausible that water does something weird, but only you noticed it. There must be some other , plausible, sort of error.

Are you talking bolometers?

Anyway, to get back to the OP's question.
If you mean "light" in the sense of visible light, essentially nothing happens.

Visible light won't do anything but heat the water.

Not really, no.
Water is practically transparent to the whole visible spectrum. So that light will pass through the water with no effect

In fact it's transparent to wavelengths down to about 190nM (Possibly further, but that's where the spectrometer I used gave up)
And the emission spectrum of xenon tails off at about 200 nM.
https://www.researchgate.net/figure/Spectral-distribution-of-flash-light-from-xenon-flash-lamp_fig1_290211701

So there's not much  absorbtion of the UV from a xenon lamp by water.

So what you are left with is the IR.
That's going to warm the water up.

The dissociation of water into solvated  H+ and OH- ions rises with temperature, so you will get more of them.

The fact that you can (rather inefficiently) heat water using a xenon flash lamp is unlikely to get much attention. So there's hardly going to be much information about it on line.

You can get water cooled xenon flash lamps- which kind of implies that the water just gets warm.
https://www.ebay.co.uk/c/4026766547

[hamdani yusuf]

You can get water cooled xenon flash lamps- which kind of implies that the water just gets warm.

It gets warm not by absorbing light radiation. Instead, it absorbs heat through conduction and convection.

[alancalverd]

It's implausible that water does something weird, but only you noticed it. There must be some other , plausible, sort of error.

The heat defect was first reported at the US National Bureau of Standards and replicated at the Physikalisch-Technische Bundesanstalt, Germany. Similar results have been reported from Russia and Canada. I left NPL before the UK water calorimeter was commissioned, but I couldn't see anything wrong with the work we did at NBS.

All that was 35 years ago and I've lost touch with the guys involved (I guess half of us are dead!). If it wasn't implausible it wouldn't be interesting!

Anyway, back to xenon strobes. The OP put his water inside a highly reflective container then added some photons. If they didn't end up heating the water, where did the energy go?  Whilst liquid water has a neat minimum absorbance in the blue/green range, the minimum value is not zero and increases by a factor of 100 towards the visible red limit. In the visible range, the xenon spectrum is almost the inverse of the water absorbance, but there are some huge peaks in the infrared, where water absorbs very strongly.

[Bored chemist]

If they didn't end up heating the water, where did the energy go?

Back into heating the xenon plasma, where they raise its temperature a bit.
Much the same as if you surround a tungsten lamp with "perfect" mirrors.

[alancalverd]

He has surrounded the water, not the lamp, with mirrors, and shone the light

through an aperture

Very much like the standard black body - a hollow sphere with a tiny hole in it.

[Bored chemist]

Back

through an aperture

into heating the xenon plasma

[Bored chemist]

Very much like the standard black body

Thing about black bodies- they are also good emitters (as well as absorbers).
And the converse is also true, good emitters like- lets say, just as an example... a xenon plasma... are good absorbers.
Much better, across the UV and visible spectra than say... water.

[Kryptid]

the article seem to have been removed by internet censors.

Why assume that "Internet censors" are responsible for its removal?

[alancalverd]

The Bilderberg Group plan to solidify all the world's water by exposing it to xenon radiation and ship blocks of it to their secret headquarters on the far side of the moon. The formula for re-liquefying polywater is encoded in the builder's invoice for the Great Pyramid, which is buried in the Vatican at a location encoded in the arrangement of Stonehenge. So in future you will have to pay for rain. Why else do you think they have fenced off Stonehenge and told everyone to stay at home? Tony Blair is a lizard. Donald Trump is an idiot. Huawei ("who are we?") owns the internet.

[Bored chemist]

the article seem to have been removed by internet censors.

Why assume that "Internet censors" are responsible for its removal?

Why not just assume he didn't look very hard
https://en.wikipedia.org/wiki/Solar_water_disinfection

[profound (OP)]

the article seem to have been removed by internet censors.

Why assume that "Internet censors" are responsible for its removal?

Because the article mentioned that high intensity light caused ions to be created and made the water alkaline when tested.

Alkaline water has health benefits and hence internet censors removed it under the pretext of fake news.

Everything that goes against big pharma is being removed or vilified or labelled as fake news.

I think it would be great if Big Pharma products were labeled as scams and snake oil.

Level the playing field.

Did you know that 510000 people died of cancer in USA in 2018 and at least 88% got chemo
 but still ended up dead !!!

Chemo is snake oil but correlation is not causation you scream...

[Bored chemist]

Alkaline water

is a contradiction in terms.
Water is neutral.

We explained here why it is impossible for the light to have any effect apart from warming teh water up a bit, yet you go off on a flight of fancy about alkaline water.
Why would you do that?
Chemo bought my mother another 5 years of life.
It does  even better in treating childhood cancers (because, obviously, kids have higher life expectancies).

Stop posting antiscience nonsense on a science web site; you just look silly.

[profound (OP)]

Alkaline water

is a contradiction in terms.
Water is neutral.


Chemo bought my mother another 5 years of life.

Their is no proof that what you stated above is true and no proof that Chemo "bought my mother another 5 years of life".

Remember correlation is not proof of causation.

[Bored chemist]

Their is no proof that what you stated above is true ".

Yes there is.
It's called science.
I have done the experiments.


Why not just withdraw your  assertion that I'm a liar, and look less of a fool?

no proof that Chemo "bought my mother another 5 years of life".

Well, she got out of bed and went round the world on holiday.
What  alternative explanation do you offer for her recovery, and that of millions of others?
What do you suggest is the reason why people with cancer now live longer than they used to?

Remember correlation is not proof of causation.

Remember that nobody said it was.
Remember not to say silly things.