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Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 10th, 2022, 6:36 pm
by jfgw
I am guessing that guessing has finished for this one. It has been answered (albeit spoilered) so I will post the explanatory photograph.
It is magnetic viewing film. Here you will see the film resting upon a magnet with a hole in it (identical to the magnet visible on the left) and the back of a fridge magnet.
(My photo).
Available via eBay and other suppliers.
Julian F. G. W.
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 10th, 2022, 11:45 pm
by UncleEbenezer
jfgw wrote:I am guessing that guessing has finished for this one. It has been answered (albeit spoilered) so I will post the explanatory photograph.
It is magnetic viewing film. Here you will see the film resting upon a magnet with a hole in it (identical to the magnet visible on the left) and the back of a fridge magnet.
I don't think that quite explains the purpose of it. Does it respond in some visual way to magnetic field? We need a similar-looking non-magnetic object as control in the photo!
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 11th, 2022, 12:31 am
by mc2fool
UncleEbenezer wrote:jfgw wrote:I am guessing that guessing has finished for this one. It has been answered (albeit spoilered) so I will post the explanatory photograph.
It is magnetic viewing film. Here you will see the film resting upon a magnet with a hole in it (identical to the magnet visible on the left) and the back of a fridge magnet.
I don't think that quite explains the purpose of it. Does it respond in some visual way to magnetic field? We need a similar-looking non-magnetic object as control in the photo!
https://youtu.be/sRlwQD7nlQoMethinks iron filings on a card sheet are more fun ... if less convenient and potentially more messy.
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 11th, 2022, 12:45 am
by servodude
mc2fool wrote:UncleEbenezer wrote:jfgw wrote:I am guessing that guessing has finished for this one. It has been answered (albeit spoilered) so I will post the explanatory photograph.
It is magnetic viewing film. Here you will see the film resting upon a magnet with a hole in it (identical to the magnet visible on the left) and the back of a fridge magnet.
I don't think that quite explains the purpose of it. Does it respond in some visual way to magnetic field? We need a similar-looking non-magnetic object as control in the photo!
https://youtu.be/sRlwQD7nlQoMethinks iron filings on a card sheet are more fun ... if less convenient and potentially more messy.
if its messy fun you want... go for ferrofluid!
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 11th, 2022, 12:51 am
by mc2fool
servodude wrote:mc2fool wrote:UncleEbenezer wrote:jfgw wrote:I am guessing that guessing has finished for this one. It has been answered (albeit spoilered) so I will post the explanatory photograph.
It is magnetic viewing film. Here you will see the film resting upon a magnet with a hole in it (identical to the magnet visible on the left) and the back of a fridge magnet.
I don't think that quite explains the purpose of it. Does it respond in some visual way to magnetic field? We need a similar-looking non-magnetic object as control in the photo!
https://youtu.be/sRlwQD7nlQoMethinks iron filings on a card sheet are more fun ... if less convenient and potentially more messy.
if its messy fun you want... go for ferrofluid!
Oooooooooh!
https://www.youtube.com/watch?v=lEvVcaEmjjo
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 11th, 2022, 8:26 pm
by jfgw
UncleEbenezer wrote:I don't think that quite explains the purpose of it. Does it respond in some visual way to magnetic field? We need a similar-looking non-magnetic object as control in the photo!
It is a little bit see-through but the stripes caused by the fridge magnet are darker than the area over mystery item number 8.
Julian F. G. W.
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 12th, 2022, 4:53 pm
by 9873210
jfgw wrote:It is a little bit see-through but the stripes caused by the fridge magnet are darker than the area over mystery item number 8.
Mystery item number 8 looks like it is made of mild steel. It would not be surprising if it had a small magnetic field. Indeed it would be surprising if it had exactly zero magnetic field. Whether it would be detectable by this film I cannot say.
Re: Mystery Items No. 6, Item 3 of 10.
Posted: April 12th, 2022, 10:18 pm
by jfgw
9873210 wrote:Mystery item number 8 looks like it is made of mild steel. It would not be surprising if it had a small magnetic field. Indeed it would be surprising if it had exactly zero magnetic field. Whether it would be detectable by this film I cannot say.
That is an excellent point. I have just checked it against a piece of black plastic, and the visibility of item no. 8 does appear to be almost entirely due to the slight transparency of the film. I could not see any difference in darkness between the two.
Julian F. G. W.