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Transcript
Magnetism and the Sun
The Magnetic Force
Is most easily
described by its
effects—it is easy
to see iron objects
react or outline
lines of magnetic
attraction.
Michael Faraday
made reference
to ’modified
space’ --an area
apparently
affected by the
magnetic force.
Magnetic field of bar magnet
Magnetic field of electromagnet
The present model
Suggests that (ferro)
magnetism is
related to the spin
of valence
electrons in
elements such as
iron, nickel and
cobalt
The Earth’s magnetic field
Is believed to be
caused by
movement in the
(liquid) outer core
due to the spin of
the earth.
The sun
Is not thought to have distinct metallic
cores,
BUT…
…does rotate at different speeds at
different “latitudes”
Matter making up the sun is in the PLASMA
state--
Positive nuclei
are separated
from their
negative
electrons
Here’s the wild side-When electric particles flow through a
circuit—they create a magnetic field
This was discovered
By accident, by Hans
Christian Oersted
in 1820
And described mathematically
by Andre-Marie
Ampere the same
year
(Ampere’s Cirucuital
Law)
An electric current
(I) flowing
through a circuit
produces a
magnetic field (B)
This means that as charged particles move
throughout the sun
They create
MANY
magnetic fields
What, me worry?