A question for scientists

[Pstotto]

In a camera obscura, light enters a dark space and creates a picture.

Something comes in that wasn't there before.

That something must have an element of warmth to it, for being light energy and yet light weighs nothing.

How can one have energy that weighs nothing?

Regarding SHC, a greater mass needs more to heat it up.

Somethings not right there...

[Pstotto]

... And don't reply 'pstotto's brain'.

I'm aware already of pain regarding that.

[jackmiggins]

Have you measured the increase in temperature?

[Pstotto]

No, purely a priori thinking.

I don't have measuring devices, for example to see if one gained weight if one opened one's eyes etc. or a camera obscura.

If there were a camera obscura witnessing a nuclear explosion perhaps a greater content of 'stuff' coming in would exaggerate the issue.

The microscopic values would probably need specialist equipment.

[Nonayforever]

I always read everyone of Pstotto's threads.

They are stimulating, well off the beaten track and have content which, in snippets, is quite deep.

Keep it up Pstotto

[Pstotto]

Cheers 'N'...

However I think you've cribbed that comment from my school report from about 45 years ago.

[BFCmaj]

I always read everyone of Pstotto's threads.

They are stimulating, well off the beaten track and have content which, in snippets, is quite deep.

Keep it up Pstotto

My brain sometimes works like this but by the time I come to write anything down, I've already forgotten it.

[Burnley1989]

I always read everyone of Pstotto's threads.

They are stimulating, well off the beaten track and have content which, in snippets, is quite deep.

Keep it up Pstotto

I always read them but often haven’t a clue what’s going on
I swear he’s my best mate from primary school, always wonder what he’s up to these days

[CombatClaret]

Q:
Does light have weight? Why?

A:
Light does have weight, meaning that it is a source of gravitational fields. A box of light weighs more than an empty box. The reason is that ALL forms of energy have weight. However, under ordinary earthly conditions, the weight of light is insignificant compared to other weights.

[Lowbankclaret]

Everything is relative.
I worked on jobs measured to a few microns, the measurement equipment had to be calibrated by something that was more accurate to anther zero and that had to be calibrated to a standard that was to another zero.

When you look into that you fine it’s not quite possible. And you get into errors of measurement.

You find some claims of this measurement or that measurement is actually within the error of measurement and is Bull Crap.

[Pstotto]

So, there is gravitas to art...

[Lowbankclaret]

There is also inbuilt error into measurement!

[Nonayforever]

Everything is relative.
I worked on jobs measured to a few microns, the measurement equipment had to be calibrated by something that was more accurate to anther zero and that had to be calibrated to a standard that was to another zero.

I too, have been involved in situations where measurements where critical, the erroneous part was concerning the temperature. Measuring different metals even at the same temperature could result in differing readings.

[dougcollins]

Isn't light a paradox, in that it is is both an electromagnetic wave and a ray?

Perhaps a wave has mass and a ray doesn't.

[Claretlad]

One for Albert Einsteine that.

[Claretlad]

One for Albert Einstein that.

[Zlatan]

I had to google it to remind myself of what I learnt years ago.

https://www.desy.de/user/projects/Physi ... _mass.html

[dougcollins]

I agree, I feel as thick as a Planck.

[Pstotto]

I'm going back to basics.

[Nonayforever]

I had to google it to remind myself of what I learnt years ago.

https://www.desy.de/user/projects/Physi ... _mass.html

Brilliant !
It made me wonder if light could be increased in speed ?

[kritichris]

I just read that article, it made my head hurt so I'm going to bed. Don't forget to turn off the light.

[appleton]

Pop a Crookes radiometer inside your box and an iris diaphragm on the front. Opening the diaphragm up will cause the rotation of the vanes to accelerate because of the increased rate of mass entering. From the change you could calculate the mass needed to cause this.

[Hipper]

In a camera obscura, light enters a dark space and creates a picture.

Something comes in that wasn't there before.

That something must have an element of warmth to it, for being light energy and yet light weighs nothing.

How can one have energy that weighs nothing?

Regarding SHC, a greater mass needs more to heat it up.

Somethings not right there...

Have you read this:

https://www.amazon.co.uk/Secret-Knowled ... 154&sr=1-1

I don't think it talks about the weight of light (e=mc2) but it's interesting none the less.

[Pstotto]

Hockney talks about how those paintings are made, but he stops there.

[Burnley1989]

Everything is relative.
I worked on jobs measured to a few microns, the measurement equipment had to be calibrated by something that was more accurate to anther zero and that had to be calibrated to a standard that was to another zero.

When you look into that you fine it’s not quite possible. And you get into errors of measurement.

You find some claims of this measurement or that measurement is actually within the error of measurement and is Bull Crap.

I work in high accuracy metrology, a few micron is a few miles to me

[thelaughingclaret]

Light is made of photons. Photons are particles and have mass. Light energy does have mass as it is a particle. Light photons have an exceedingly small mass (10^-54 kg ish) but it still has mass. Everything with energy has to have a mass and energy can not be created or destroyed.

[Pstotto]

A free bit of Vitamin D with every Picasso... Is that vitamin in the photon? From the Holland and Barratt 'shop' 93 million miles away?

[Lowbankclaret]

I work in high accuracy metrology, a few micron is a few miles to me

I wish I could visit and have a good debate. Doing measurement system analysis showed many measurement instruments were simply not fit for purpose.
Repeatability and reproducibility were far worse than ever thought.

[Burnley1989]

I wish I could visit and have a good debate. Doing measurement system analysis showed many measurement instruments were simply not fit for purpose.
Repeatability and reproducibility were far worse than ever thought.

It’s a fun job to be involved in though, true accuracy and repeatability often confused.

I’ve mainly been involved in 3D measurement using confocal, interferometry and focus variation over the last 12 months.

[Pstotto]

You have to measure only from one fixed point, no?

[Bosscat]

I am afraid most of the arguments on this thread are a tad "Light weight"

I'll get mi coat

[Pstotto]

... Yeah and with a hole in your pocket for a hand shuffle.