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How does Earth’s magnetic field protect us?

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  How does Earth’s magnetic field protect us? Sam Wormley <swormley1@gmail.com> - 2015-09-14 20:18 -0500
    Re: How does Earth’s magnetic field protect us? gilber34 <invalid@invalid.com> - 2015-09-14 20:36 -0500
      Re: How does Earth’s magnetic field protect us? Fabian Russell <root@localhost.localdomain> - 2015-09-15 04:09 +0000
        Re: How does Earth's magnetic field protect us? john <johnsefton288@gmail.com> - 2015-09-15 03:05 -0700
    Re: How does Earth’s magnetic field protect us? jimp@specsol.spam.sux.com - 2015-09-15 01:33 +0000

#521199 — How does Earth’s magnetic field protect us?

How does Earth’s magnetic field protect us?
> http://www.askamathematician.com/2014/07/q-how-does-earths-magnetic-field-protect-us/

> Physicist: High energy charged particles rain in on the Earth from
> all directions, most of them produced by the Sun.  If it weren’t for
> the Earth’s magnetic field we would be subject to bursts of radiation
> on the ground that would be, at the very least, unhealthy.  The more
> serious, long term impact would be the erosion of the atmosphere.
> Charged particles carry far more kinetic energy than massless
> particles (light), so when they strike air molecules they can kick
> them hard enough to eject them into space.  This may have already
> happened on Mars, which shows evidence of having once had a magnetic
> field and a complex atmosphere, and now has neither (Mars’ atmosphere
> is ~%1 as dense as ours).
>
> Rule #1 for magnetic fields is the “right hand rule”: point your
> fingers in the direction a charged particle is moving, curl your
> fingers in the direction of the magnetic field, and your thumb will
> point in the direction the particle will turn.  The component of the
> velocity that points along the field is ignored (you don’t have to
> curl your fingers in the direction they’re already pointing), and the
> force is proportional to the speed of the particle and the strength
> of the magnetic field.

> As it happens, the Earth has a magnetic field and the Sun fires
> charged particles at us (as well as every other direction) in the
> form of “solar wind”, so the right hand rule can explain most of what
> we see.  The Earth’s magnetic field points from south to north
> through the Earth’s core, then curves around and points from north to
> south on Earth’s surface and out into space.  So the positive
> particles flying at us from the Sun are pushed west and the negative
> particles are pushed east (right hand rule).


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#521204

On 9/14/2015 8:18 PM, Sam Wormley wrote:
> How does Earth’s magnetic field protect us?
>> http://www.askamathematician.com/2014/07/q-how-does-earths-magnetic-field-protect-us/
>>
>
>> Physicist: High energy charged particles rain in on the Earth from
>> all directions, most of them produced by the Sun.  If it weren’t for
>> the Earth’s magnetic field we would be subject to bursts of radiation
>> on the ground that would be, at the very least, unhealthy.

which is why we cannot go to, or stay on Mars.

The moon is very difficult too, as one has to use water to slow down 
cosmic rays, using lead and metals as shields cause a secondary 
radiation inside.

For extra points: What is the name of the radiation? (starts with a B)

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#521224

On Mon, 14 Sep 2015 20:36:15 -0500, gilber34 wrote:

> 
> The moon is very difficult too, as one has to use water to slow down 
> cosmic rays, using lead and metals as shields cause a secondary 
> radiation inside.
> 

The only solution would be to create locally an artificial magnetic
field.


>
> What is the name of the radiation? (starts with a B)
>

Bremsstrahlung

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#521241 — Re: How does Earth's magnetic field protect us?

Fabian said:
A very smart thing!
"The only solution would be to create locally an artificial magnetic 
field. "
Yes!
Copy the magnetic field of atoms, which
is a blended rotating/precessing field.
Put it in a vehicle with a circular profile-
either a disk or a cylinder.
Now you travel with protection.

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#521208

Sam Wormley <swormley1@gmail.com> wrote:
> How does Earth?s magnetic field protect us?

As most of us learned in grade school, pretty well, spamming shit head.


-- 
Jim Pennino

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