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Author: Sue...Sue...
Date: Dec 9, 2007 23:54
On Dec 10, 2:11 am, BURT yahoo.com> wrote:> On Dec 9, 10:40 pm, "Timo A. Nieminen" physics.uq.edu.au> wrote:
>
>
>
>
>>> On Sun, 9 Dec 2007, Tom Roberts wrote:
>>> BURT wrote:
>>>> What is it in a transparent medium like a prism that bends light rays
>>>> differently yielding a rainbow?
>
>>> The key thing about using a prism to separate visible light into colors is
>>> that the light enters the prism at an angle relative to its face. The
>>> continuity of light waves plus the fact that light travels slower in glass
>>> than in air is enough to show that the prism will bend violet light (shorter
>>> wavelength) more than red light (longer wavelength).
>
>>> The many answers mentioning dispersion are not relevant to this -- an
>>> ordinary prism will separate light without any dispersion being present, ...
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Author: Sue...Sue...
Date: Dec 9, 2007 23:39
On Dec 10, 2:08 am, BURT yahoo.com> wrote:> On Dec 9, 10:54 pm, "Sue..." yahoo.com.au> wrote:
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>
>
>
>>> On Dec 9, 7:41 pm, BURT yahoo.com> wrote:
>> ->
>>> Acceleration slows time not steady motion.
>
>> K.E. = 1/2 mv^2
>
>> So there could be some truth in that.
>
>>> Steady motion has an
>>> inertia that keeps timerate a constant.
>
>> Inertial motion doesn't require the input of ...
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3 Comments |
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Author: BURTBURT
Date: Dec 9, 2007 23:30
On Dec 9, 9:03 pm, Tom Roberts sbcglobal.net> wrote:> BURT wrote:
>> What is it in a transparent medium like a prism that bends light rays
>> differently yielding a rainbow?
>
> The key thing about using a prism to separate visible light into colors
> is that the light enters the prism at an angle relative to its face. The
> continuity of light waves plus the fact that light travels slower in
> glass than in air is enough to show that the prism will bend violet
> light (shorter wavelength) more than red light (longer wavelength).
>
> The many answers mentioning dispersion are not relevant to this -- an
> ordinary prism will separate light without any dispersion being present,
> because this is strictly geometry and the requirement that the
> constituent waves all be continuous at the air/glass boundaries.
>
>> Different light wavelengths bend
>> differently.
>
> This could be EITHER the above question or a new one. For the above ...
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Author: hhc314hhc314
Date: Dec 9, 2007 17:37
On Dec 9, 8:02 pm, "Androcles" wrote:
> "BURT" yahoo.com> wrote in message
>
> news:b97ca64c-47c2-4d5b-a67b-ebe6ccfbaed9@t1g2000pra.googlegroups.com...
> : On Dec 9, 4:52 pm, BURT yahoo.com> wrote:
> : > What is it in a transparent medium like a prism that bends light rays
> : > differently yielding a rainbow? Different light wavelengths bend
> : > differently. What is the cause? I would like to know.
> : >
> : > How does light aquire a new direction consistently through a prism?
> : > How does it orient?
> : >
> : > Mitch Raemsch
> :
> : This phenomenon is kown as dispersion. But I see no cause or
> : explanation.
>
> How does a spinning stone skip on water?
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Author: JeckylJeckyl
Date: Dec 9, 2007 14:21
>
>
> If I am departing London at 0.8c and I want to cook an egg for
> three minutes, do I look at my quartz wrist watch or Big Ben?
>
> << it is impossible to perform a physical experiment
> which differentiates in any fundamental sense between
> different inertial frames. >>
> http://farside.ph.utexas.edu/teaching/jk1/lectures/node7.html
If you knew what the principle of relativity actually was, you would know
the answer.
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5 Comments |
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Author: copepodcopepod
Date: Dec 9, 2007 13:46
except few one none of tha poster in this group
here do or did physics for real
thay foken just cut and paste bullshit from books
and such
thay are foken brain dead, you know who yo are
i am wasting my time with yer morons here, and
therefore i think i will leave
fok you all morons
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6 Comments |
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Author: John JonesJohn Jones
Date: Dec 9, 2007 12:26
If a sphere (or circle) is large enough, or if we are small enough,
then we view the sphere as being, not curved, but straight.
So any circle that is viewed from the smallest viewpoint - from its
centre for example, is not a circle, but a straight line. This
straight line is as straight as the line that is tangent to the very
same circle. The only difference between the two straight lines is
topological - the straight-line tangent to the circle is open, while
the straight-line circle is closed.
We can conclude: Geometrical properties of curvature and distance in
Euclidean and non-euclidean spaces, are not real properties but
subjective simplifications, and as such quite inaccesible to the
machine and to any analysis through the claimed rigors of
calculation.
We might also conclude that pi is not a property of curvature, or a
property of circles per se, but a property of a particular topology.
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6 Comments |
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Author:
Date: Dec 9, 2007 12:13
"The Ghost In The Machine" sirius.tg00suus7038.net> wrote in message
news:5uot25-6pj.ln1@sirius.tg00suus7038.net...
: In sci.physics.relativity, Sue...
: yahoo.com.au>
: wrote
: on Sun, 9 Dec 2007 03:22:16 -0800 (PST)
: i29g2000prf.googlegroups.com>:
: >
: >
: > If I am departing London at 0.8c and I want to cook an egg for
: > three minutes, do I look at my quartz wrist watch or Big Ben?
:
: Neither. The egg is already fried. Vaporized, in fact.
: (As is the rest of the spacecraft.)
:
And your bullshitting evidence for this is?
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Author:
Date: Dec 9, 2007 12:00
"The Ghost In The Machine" sirius.tg00suus7038.net> wrote in message
news:5tmt25-dcj.ln1@sirius.tg00suus7038.net...
: In sci.physics.relativity, Paul B. Andersen
:
: wrote
: on Fri, 07 Dec 2007 14:55:01 +0100
: <475950B5.5000005@hiadeletethis.no>:
: > This is an applet illustrating time dilation in bodies moving
: > in the vicinity of the Earth.
: >
: > http://home.c2i.net/pb_andersen/Satellites.html
: >
: > Good ol' Newton is used to determine the motion of the bodies,
: > while the Schwarzschild metric is used to determine their
: > proper times.
:
: The GUI needs a bit of work but the idea is an
: interesting one. I'm also curious as to whether
: there's an explanation of the formulas used;
: http://relativity.livingreviews.org/open?pubNo=lrr-2003-1 ...
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