## Re: [nanotech] Do Shadows have weight?

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• In a message dated 10/08/2001 9:24:24 PM Pacific Daylight Time, ... Give me a break. Yeah, it has mass, and mass is constant whereas weight is relative to
Message 1 of 9 , Oct 8, 2001
In a message dated 10/08/2001 9:24:24 PM Pacific Daylight Time, winchp@... writes:

you are kidding me.  Light has weight!? I know you don't know what you are talking about because if you did you would have used "mass" not "weight".

Give me a break. Yeah, it has mass, and mass is constant whereas weight is relative to gravitational force. I wasn't going to make the correction because that would have been a bit too anal in the context of the technical level of the question. Sheesh.

Derek
• ... what you are ... not weight . ... weight is ... correction ... technical ... Actually, light does not have a mass, light has _momentum_, proportional to
Message 2 of 9 , Oct 10, 2001
--- In nanotech@y..., Ooo0001@a... wrote:
> In a message dated 10/08/2001 9:24:24 PM Pacific Daylight Time,
> winchp@o... writes:
>
>
> > you are kidding me. Light has weight!? I know you don't know
what you are
> > talking about because if you did you would have used "mass"
not "weight".
>
> Give me a break. Yeah, it has mass, and mass is constant whereas
weight is
> relative to gravitational force. I wasn't going to make the
correction
> because that would have been a bit too anal in the context of the
technical
> level of the question. Sheesh.
>
> Derek

Actually, light does not have a mass, light has _momentum_,
proportional to the frequency of the light. p=E/c = h(nu)/c

:) ed
• does it have mass or something resembling mass behaviour derived from momentum? P ... From: Ed Minchau To:
Message 3 of 9 , Oct 10, 2001
does it have mass or something resembling mass behaviour derived from momentum?

P
----- Original Message -----
From: "Ed Minchau" <spider_boris@...>
To: <nanotech@yahoogroups.com>
Sent: Thursday, October 11, 2001 10:51 AM
Subject: [nanotech] Re: Do Shadows have weight?

> --- In nanotech@y..., Ooo0001@a... wrote:
> > In a message dated 10/08/2001 9:24:24 PM Pacific Daylight Time,
> > winchp@o... writes:
> >
> >
> > > you are kidding me. Light has weight!? I know you don't know
> what you are
> > > talking about because if you did you would have used "mass"
> not "weight".
> >
> > Give me a break. Yeah, it has mass, and mass is constant whereas
> weight is
> > relative to gravitational force. I wasn't going to make the
> correction
> > because that would have been a bit too anal in the context of the
> technical
> > level of the question. Sheesh.
> >
> > Derek
>
> Actually, light does not have a mass, light has _momentum_,
> proportional to the frequency of the light. p=E/c = h(nu)/c
>
> :) ed
>
>
>
>
> The Nanotechnology Industries mailing list.
> "Nanotechnology: solutions for the future."
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
• ... from momentum? ... It has momentum, which can be used to knock electrons loose from their atoms. Einstein won one of his two Nobel Prizes for explaining
Message 4 of 9 , Oct 11, 2001
--- In nanotech@y..., "server not recognized" <winchp@o...> wrote:
> does it have mass or something resembling mass behaviour derived
from momentum?
>
> P

It has momentum, which can be used to knock electrons loose from
their atoms. Einstein won one of his two Nobel Prizes for explaining
this (the photoelectric effect) (incidentally, his other one was for
a paper explaining Brownian motion...remarkably, Einstein did not
receive the Nobel for his work on Relativity).

The higher the frequency of the light, the more momentum, and thus
the more electrons which may be knocked loose, chemical bonds broken,
etc.

:) ed

> ----- Original Message -----
> From: "Ed Minchau" <spider_boris@y...>
> To: <nanotech@y...>
> Sent: Thursday, October 11, 2001 10:51 AM
> Subject: [nanotech] Re: Do Shadows have weight?
>
>
> > --- In nanotech@y..., Ooo0001@a... wrote:
> > > In a message dated 10/08/2001 9:24:24 PM Pacific Daylight Time,
> > > winchp@o... writes:
> > >
> > >
> > > > you are kidding me. Light has weight!? I know you don't know
> > what you are
> > > > talking about because if you did you would have used "mass"
> > not "weight".
> > >
> > > Give me a break. Yeah, it has mass, and mass is constant
whereas
> > weight is
> > > relative to gravitational force. I wasn't going to make the
> > correction
> > > because that would have been a bit too anal in the context of
the
> > technical
> > > level of the question. Sheesh.
> > >
> > > Derek
> >
> > Actually, light does not have a mass, light has _momentum_,
> > proportional to the frequency of the light. p=E/c = h(nu)/c
> >
> > :) ed
> >
> >
> >
> >
> > The Nanotechnology Industries mailing list.
> > "Nanotechnology: solutions for the future."
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
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