Quantum Laser Pointers - Popular Bunk?

[Alaskan]

Look at this advertisement regarding the double slit experiment and their pointer offering. I don't think this is anything more than a toy, you really can't do anything with it in regards to that experiment, can we?

 

[BobMc]

This really interesting. Curious, might be fun to have one just to goof around with.

 

[lasersbee]

I only saw a cartoon of a product. I didn't really see any
actual product or actual beam spot of that experiment on
any actual surface.
It looks like a Dollar Store pointer with it's LR44 button cells
and probably a plastic "slit" front end.
I'd invest $2-$3 in that or build one myself.

Jerry

 

[Alaskan]

The slits will cause an interference pattern, but they are huge slits compared to the size of the ones used in the real experiment. Doesn't matter I suppose, just an interesting toy which shows an interference pattern.

Edit: found a link on how to do the double slit experiment at home http://www.teralab.co.uk/Experiments/Youngs_Slits/Youngs_Slits_Menu.htm

 

[lasersbee]

Interesting.....
I wonder how they got all that into the Keychain pointer...

Jerry

 

[Alaskan]

Quantum tunneling

 

[paul1598419]

That toy interferometer is pretty useless except to show that interference patterns exist. If it sells for more than a couple dollars, it is not worth it. As the rulings become more dense in a diffraction grating the angle that different wavelengths have with respect to each other increases and makes for a more sensitive setup, with better experiments that can be accomplished. Thanks for sharing this, Alaskan.