Jan Panteltje wrote:
On a sunny day (29 Sep 2005 12:25:21 -0700) it happened
wrote You should read what I wrote in
http://groups.google.com/group/sci.p...9882 b8208564
It's fun to read. But i'm no judge.
Can frequency in contrast to wave length be measured with a prism and
the spectrum lines of the atoms ?

And still another question. If one splits a light ray with a semi -
mirror and let one part go straight and the other, may be with two more
mirrors, passing through water and then joining both parts, can one
observe still interference.? (This might need adjusting the distance
passing through water a bit )Or just letting one part going a longer
way, than the other ?
Thanks for all Your help
Hero

On a sunny day (9 Oct 2005 09:08:23 -0700) it happened
wrote in . com:

Jan Panteltje wrote:
On a sunny day (29 Sep 2005 12:25:21 -0700) it happened
wrote You should read what I wrote in

http://groups.google.com/group/sci.p...9882 b8208564
It's fun to read. But i'm no judge.
Can frequency in contrast to wave length be measured with a prism and
the spectrum lines of the atoms ?
I think so, but I would mix the spectral line with a known monochromatic
source and use the difference frequency...
Somebody correct me if I am wrong on this.

And still another question. If one splits a light ray with a semi -
mirror and let one part go straight and the other, may be with two more
mirrors, passing through water and then joining both parts, can one
observe still interference.? (This might need adjusting the distance
passing through water a bit )Or just letting one part going a longer
way, than the other ?
Yes I think so, the beam through water would be delayed, but still
cause an interference pattern, as that only goes over one wavelength.
(delay of 360 degrees = 1 wavelength, and you have the same effect).

Jan Panteltje wrote:
On a sunny day (9 Oct 2005 09:08:23 -0700) it happened
wrote
....
And still another question. If one splits a light ray with a semi -
mirror and let one part go straight and the other, may be with two more
mirrors, passing through water and then joining both parts, can one
observe still interference.? (This might need adjusting the distance
passing through water a bit )Or just letting one part going a longer
way, than the other ?
Yes I think so, the beam through water would be delayed, but still
cause an interference pattern, as that only goes over one wavelength.
(delay of 360 degrees = 1 wavelength, and you have the same effect).
What about a few cycles difference? Actually, now i got the right
word:
it's phase shift. So what about a phase shift of a ten cycles = ten
times 36o degerees or so.
Does it still interfere ?
Regards
Hero

On a sunny day (9 Oct 2005 12:02:48 -0700) it happened
wrote in . com:


Jan Panteltje wrote:
On a sunny day (9 Oct 2005 09:08:23 -0700) it happened
wrote
...
And still another question. If one splits a light ray with a semi -
mirror and let one part go straight and the other, may be with two more
mirrors, passing through water and then joining both parts, can one
observe still interference.? (This might need adjusting the distance
passing through water a bit )Or just letting one part going a longer
way, than the other ?
Yes I think so, the beam through water would be delayed, but still
cause an interference pattern, as that only goes over one wavelength.
(delay of 360 degrees = 1 wavelength, and you have the same effect).
What about a few cycles difference? Actually, now i got the right
word:
it's phase shift. So what about a phase shift of a ten cycles = ten
times 36o degerees or so.
Does it still interfere ?
Regards
Hero
Yes, this is what I tried to convey, the interference pattern will repeat
every whole wavelength, so each 360 degrees of a period.
You can tell phase, but not absolute distance, unless you slowly move out
and count the fringes changing......

Jan Panteltje wrote:
On a sunny day (9 Oct 2005 12:02:48 -0700) it happened Hero.
And still another question. If one splits a light ray with a semi -
mirror and let one part go straight and the other, may be with two more
mirrors, passing through water and then joining both parts, can one
observe still interference.? (This might need adjusting the distance
passing through water a bit )Or just letting one part going a longer
way, than the other ?
Yes I think so, the beam through water would be delayed, but still
cause an interference pattern, as that only goes over one wavelength.
(delay of 360 degrees = 1 wavelength, and you have the same effect).
What about a few cycles difference? Actually, now i got the right
word:
it's phase shift. So what about a phase shift of a ten cycles = ten
times 36o degerees or so.
Does it still interfere ?

Yes, this is what I tried to convey, the interference pattern will repeat
every whole wavelength, so each 360 degrees of a period.
You can tell phase, but not absolute distance, unless you slowly move out
and count the fringes changing......
Nowadays one needs the magic words and then one can find out about
things. I found the word referring to our discussion in a Thread from
2000:
"Q: How does "coherence length" affect diffraction?"
Andy tells us more about it.
So thanks for Your help
Hero