What is Light ?

Grayson

mawk wrote: »

being an engineer that makes lasers. I call bullandorhorse****.

being an engineer, you're a tier below a scientist, Mr. mawk.

kneemos

EoghanIRL wrote: »

It's electro magnetic radiation visible to humans . The associated particle is the photon which is massless allowing it to travel so fast .

Good job it's visible or we'ed all be in the dark.Does this prove the existance of God?

Antar Bolaeisk

kneemos wrote: »

Good job it's visible or we'ed all be in the dark.Does this prove the existance of God?

No, it just proves that being able to see in a wider band of wavelengths didn't offer any advantage. I think there is a condition called tetrachromacy in humans which allows for vision across a wider range of wavelengths.

kneemos

Antar Bolaeisk wrote: »

No, it just proves that being able to see in a wider band of wavelengths didn't offer any advantage. I think there is a condition called tetrachromacy in humans which allows for vision across a wider range of wavelengths.

Seen a thing on TV once where blind people had developed an extremely advanced form of sonar by clicking,they showed one guy cycling down the street with not a bother.Makes you wonder what else we can do if put our minds to it.

pragmatic1

mawk wrote: »

not really.. Its fairly well understood. we know what photons are made of, we understand quantum interactions and macro actions of particle and wave motion are all understood.

its a mental oddity to think of it in terms of single pellets of light which behave one way but when there is a whole bunch of them they move in a wave, but thats the jist of light. the colour is all to do with the shape of the wave they move in and how much energy they lose when they bounce off things.

Mind hurtingly, things dont have colours as an inherent property. its all down to what bits of the white light are and arent sucked into the object and kept there

Quantum mechanic is well understood? Muhahahaha.

mawk

pragmatic1 wrote: »

Quantum mechanic is well understood? Muhahahaha.

Holy crap you are right!

"lads! Man on the street doesn't understand quantum physics, cancel making lasers, diodes, transistors, memristors, **** it all ICs. Cancel all the chemistry with covailent bonding , cancel the internet, cancel fmri machines and election microscopes, shut down cern!!

It's not like we should be playing with forces "we" don't understand!"

Dempsey

mawk wrote: »

Holy crap you are right!

"lads! Man on the street doesn't understand quantum physics, cancel making lasers, diodes, transistors, memristors, **** it all ICs. Cancel all the chemistry with covailent bonding , cancel the internet, cancel fmri machines and election microscopes, shut down cern!!

It's not like we should be playing with forces "we" don't understand!"

yes, diodes and transistors covers the scope of quantum mechanics

Grayson

kneemos wrote: »

Good job it's visible or we'ed all be in the dark.Does this prove the existance of God?

I asked him and he said yes.

jacoblukis

The natural agent that stimulates sight and makes things visible; electromagnetic radiation from about 390 to 740 nm in wavelength.

Pherekydes

Anything under 5% a.b.v. is light.

pragmatic1

mawk wrote: »

Holy crap you are right!

"lads! Man on the street doesn't understand quantum physics, cancel making lasers, diodes, transistors, memristors, **** it all ICs. Cancel all the chemistry with covailent bonding , cancel the internet, cancel fmri machines and election microscopes, shut down cern!!

It's not like we should be playing with forces "we" don't understand!"

It's has been exploited for almost around a hundred years but that's not the same as understanding it.;)

ronan45

So for instance... You look up to the sky at night... You focus on a distant star.
Those light waves have travelled billions of years and are desttoyed in the back of your retina. Kinda Kewwlll:cool:

stoneill

My pay.

stefan idiot jones

Just to confuse you a bit more, a friend tried to explain to me that colour doesn't exist.
He used the analogy that the inside of an orange isn't orange until we see it as it's the light entering our eyes etc. etc. that we see that it is orange in colour.
I told him that it is still orange even though we can't see it but he wouldn't have it at all.
I don't know who was right or wrong but it wrecked my head.

Jezek

stefan idiot jones wrote: »

Just to confuse you a bit more, a friend tried to explain to me that colour doesn't exist.
He used the analogy that the inside of an orange isn't orange until we see it as it's the light entering our eyes etc. etc. that we see that it is orange in colour.
I told him that it is still orange even though we can't see it but he wouldn't have it at all.
I don't know who was right or wrong but it wrecked my head.

The inside of an orange is white.

stefan idiot jones

Are you taking the pith ?