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Fun With Magnetic Viewing Film
This green magnetic viewing film will become lighter
or darker when a magnetic field is applied. It turns dark when the
field lines are perpendicular the the surface, and it turns light when
the field lines are horizontal, i.e., across the surface. If a magnet
is placed under it, with one of the poles facing the film, it will show
the magnet as dark with a light outline. The effect gets interesting when
you have lots of magnets, or magnets that are polarized in a unique way.
The entertainment value of this stuff is unmatched, even by the likes of
playing Pac-man or watching professional wrestling!
Here is the view of the fields of our item
#2 magnet. This clearly demonstrates how the magnet is polarized
with both a north and south pole on each flat face of the magnet.
Now we start to have fun with stacks of magnets!
Here we have a stack of our item
#34 magnets with the film placed directly on the poles.
The same magnets with the film on the sides.
Here is the film on the sides of item #16 . Remember that these are polarized along the long edge of the magnets.
Item #16 at the ends.
Item #24 small cube magnets shown at the poles.
The same small cubes shown along the sides of the magnets.
Although they will attract and stick together along the sides, this clearly
demonstrates why the attraction is so much stronger at the poles.
A view of the poles of item #26 . These ones are clearly polarized along the long narrow edges.
The flat surfaces through which the #26 magnets are polarized.
And along the short narrow edges of the same.
And now for something completely different....Spheres!
Here shows what was a surprise to me...the film over a
block of item
#14 1/4 inch sphere magnets.
A pile of item
#28 3/4 inch sphere magnets.
Even the most basic rubberized refrigerator magnets can
be interesting. As you can see here, poles alternate in strips across the
face of a fridge magnet. The field is weak on these, and with a neodymium
magnet, you can easily de-magnetize them, and change the orientation of
the poles.
Here we applied a fridge magnet to a large neodymium magnet
to "erase" it; then we placed a #2 magnet on it briefly, and you can see
that the refrigerator magnet retains a shadow of the neo magnet which is
no longer there. The fridge magnet clearly has some magnetization, but
much less than it used to. It will barely hold itself to the fridge, but
can no longer hold a sheet of paper up.
Click here for more information and to order this product!
We will gladly accept, review and consider your science experiment submissions for inclusion on this site, whether you are age 6 or age 100! Email us for details.
Every experiment on these pages must be done with adult supervision only!!! If you are already an adult, we recommend getting a friend to help so you don't do anything childish and hurt yourself. We'll try to provide safety warnings, but cannot be held responsible for your own safety. Many of these experiments and many of the books we sell are from another era when safety was not a consideration, so PAY ATTENTION to the hazards of what you are doing! Wear safety goggles and gloves. Don't be stupid--YOU are supposed to be the adult here!
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THIS PAGE LAST UPDATED 1/23/02