Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Science & Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-31-2011, 12:22 AM #17
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,425
Rep Power: 15522
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,425
Rep Power: 15522
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Levitating frogs and humans

Well, it does get more complicated when you consider material properties. In case of the frog, i think they just calculated with water as the average material, both in density and in diamagnetic properties.

If you would substitute the water from something entirely different (say, ethanol), the required field strength for levitation would be different too.


Benm is online now   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 02-01-2011, 11:39 PM #18
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Levitating frogs and humans

True, but I don't think anyone could drink enough ethanol to make a difference in the magnetic field they need.
Bluefan is offline   Reply With Quote
Old 02-02-2011, 12:22 AM #19
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,425
Rep Power: 15522
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,425
Rep Power: 15522
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Levitating frogs and humans

Nah, its fairly reasonable to assume that all vertrabrates have roughly the same composition really. The frog experiment has been repeated using mice at JPL, which is further practical proof its perfectly feasible to diamagentically levitate a human, as long as you get the -area- of the magnetic field large enough.

The field strength is not really a problem. Most modern day NMR machines found in university biochemistry departments produce a field strong enough to levitate animals, but the bore is suited for 5mm diameter tubes, not frogs.

The problem with building a machine that can levitate a man is in the material properties of current superconductors: they break down because of the large field strength required to generate a field that strong and that big. This is why the frog team had to use a conventional electromagnet and use a shitload of power to maintain the field... in a superconducting magnet there is no power required to maintain the field once its powered up.
Benm is online now   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 02:57 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC