Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the database of laser pointer companies. The link will open in a new window for your convenience.

 Laser Pointer Forums - Discuss Laser Pointers Dr Quantum - Double Slit Experiment Laser Pointer Company Database     Laser Top Sites List     Lasers by Type     Green Lasers

10-10-2014, 01:58 AM #1
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Dr Quantum - Double Slit Experiment

What do you all think is really going on here? Is this just woo woo or what?

Dr Quantum - Double Slit Experiment - YouTube

A much longer NOVA documentary on quantum: http://www.youtube.com/watch?v=CBrsWPCp_rs

Late edit: Another good video regarding quantum: http://www.youtube.com/watch?v=GkkIvp71P1c

A historical account from 1985 of the long standing debate between Niels Bohr and Albert Einstein regarding the validity of the quantum mechanical description of atomic phenomena and observation of quantum states with respect to the uncertainty principle and quantum entanglement: http://www.youtube.com/watch?v=BFvJOZ51tmc

__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

Last edited by Alaskan; 10-10-2014 at 03:55 AM.

10-10-2014, 02:12 AM #2
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Re: Dr Quantum - Double Slit Experiment

You find this kind of thing uninteresting and spamful? I don't, take a look at these, they are well worth a watch.
__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

10-10-2014, 02:24 AM #3
 Class 4 Laser Join Date: Sep 2007 Location: Wisconsin Posts: 8,859 Rep Power: 1379
Cyparagon
Class 4 Laser

Join Date: Sep 2007
Location: Wisconsin
Posts: 8,859
Rep Power: 1379
Re: Dr Quantum - Double Slit Experiment

Don't be so quick to jump, Mr Lander.

Quantum physics is a legitimate field, and the double slit is a valid, reproducible experiment. There are already a few threads on this subject. Diffraction gratings are a real-world use of double-slit.
__________________
A problem well stated is a problem half solved.

10-10-2014, 02:28 AM #4
 Super Moderator Join Date: Sep 2013 Location: Central California Coast Posts: 6,180 Rep Power: 1788
Hap
Super Moderator

Join Date: Sep 2013
Location: Central California Coast
Posts: 6,180
Rep Power: 1788
Re: Dr Quantum - Double Slit Experiment

Quote:
 Originally Posted by Cyparagon Don't be so quick to jump, Mr Lander. Quantum physics is a legitimate field, and the double slit is a valid, reproducible experiment. There are already a few threads on this subject. Diffraction gratings are a real-world use of double-slit.
Alright, sorry I got ahead of myself.

-Alex
__________________
My Lasers:
650nm: laserbtb LP650-5 (peak 15mW)
635nm: Laserglow Libra (peak 4mW)
593.5nm: Laserglow Rigel-2 (peak 1mW)
532nm: Laserglow Anser (peak 4mW)
405nm: laserbtb LP405-5 (waiting for arrival)

"Open your eyes, look within. Are you satisfied with the life you're living?" -Bob Marley
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” -Carl Sagan
You are important: Pale Blue Dot

10-10-2014, 02:32 AM #5
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Re: Dr Quantum - Double Slit Experiment

Sometimes I feel like an entangled electron with this young gentleman, if I spin one way, he spins another
__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

10-10-2014, 03:28 AM #6
 Banned Join Date: May 2011 Posts: 1,065 Rep Power: 0
VisibleGreen
Banned

Join Date: May 2011
Posts: 1,065
Rep Power: 0
Re: Dr Quantum - Double Slit Experiment

Don't blame greenlander. It's become a habitual response for all of us with laser projects threads lately

Last edited by VisibleGreen; 10-10-2014 at 03:30 AM. Reason: added lately

10-10-2014, 03:36 AM #7
 Super Moderator Join Date: Sep 2013 Location: Central California Coast Posts: 6,180 Rep Power: 1788
Hap
Super Moderator

Join Date: Sep 2013
Location: Central California Coast
Posts: 6,180
Rep Power: 1788
Re: Dr Quantum - Double Slit Experiment

Quote:
 Originally Posted by VisibleGreen Don't blame greenlander. It's become a habitual response for all of us with laser projects threads lately
Lol

-Alex
__________________
My Lasers:
650nm: laserbtb LP650-5 (peak 15mW)
635nm: Laserglow Libra (peak 4mW)
593.5nm: Laserglow Rigel-2 (peak 1mW)
532nm: Laserglow Anser (peak 4mW)
405nm: laserbtb LP405-5 (waiting for arrival)

"Open your eyes, look within. Are you satisfied with the life you're living?" -Bob Marley
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” -Carl Sagan
You are important: Pale Blue Dot

10-10-2014, 04:29 PM #8
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Re: Dr Quantum - Double Slit Experiment

Yea, what is that about? I don't understand individuals who choose to come to threads they don't like or agree with and keep adding to them themselves. To get back on topic, how many of you are familiar with this stuff, the double slit experiment and the implications it provides? I've been following this science for so long I have almost received the impression it is common knowledge but then find people who look at me with deer in the headlight eyes when I bring the subject up with fellow engineers.
__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

10-10-2014, 04:38 PM #9
 Class 3R Laser Join Date: Dec 2008 Location: Norway Posts: 2,128 Rep Power: 249
Grix
Class 3R Laser

Join Date: Dec 2008
Location: Norway
Posts: 2,128
Rep Power: 249
Re: Dr Quantum - Double Slit Experiment

The double slit experiment is pretty strange indeed, but that video are full of misleading information.

He says something like "just by observing" the pattern changes. Well, observing individual particles require us to interact with them. So they are absolutely not unaffected by the fact that they are picked up by a sensor, and in that sense it is not so unexplainable that the pattern changes.

Basically, this experiment is just a real life consequence of the uncertainty principle which requires the light to bend when going through the slit because it lets us too finely know the position of the photons, and the fact that light and small particles can act as a wave and overlap.

It's like gravity, we have all the equations and laws to describe how it works, we just don't exactly know why or by which mechanism it works.

Last edited by Grix; 10-10-2014 at 04:40 PM.

10-10-2014, 07:35 PM #10
 Class 3B Laser Join Date: Jan 2008 Location: Sweden Posts: 3,042 Rep Power: 400
FireMyLaser
Class 3B Laser

Join Date: Jan 2008
Location: Sweden
Posts: 3,042
Rep Power: 400
Re: Dr Quantum - Double Slit Experiment

Quote:
 Originally Posted by Laser Project I've been following this science for so long I have almost received the impression it is common knowledge but then find people who look at me with deer in the headlight eyes when I bring the subject up with fellow engineers.
__________________
Niko likes cereal.

10-10-2014, 08:57 PM #11
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Re: Dr Quantum - Double Slit Experiment

We all have one.
__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

10-11-2014, 12:41 AM #12
 Class 1M Laser Join Date: Aug 2013 Location: Enschede - Netherlands Posts: 105 Rep Power: 38
Svenvbins
Class 1M Laser

Join Date: Aug 2013
Location: Enschede - Netherlands
Posts: 105
Rep Power: 38
Re: Dr Quantum - Double Slit Experiment

Really interesting, nicely explained. Makes me think back to my quantum courses though... Brrr!

Quote:
 Originally Posted by Grix The double slit experiment is pretty strange indeed, but that video are full of misleading information.
Full of? The only one I found (so far) is the one you mentioned, it's not purely the observing that affects the electrons but actually the interaction that is necessary to measure them. Other than that, I think it's pretty okay? (It's waaay past bedtime though... Something might be flying over my head )
EDIT: I've only watched the first video, not 100% sure whether you were meaning one of the others.

Last edited by Svenvbins; 10-11-2014 at 12:41 AM.

10-11-2014, 09:20 AM #13
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,294 Rep Power: 2141
Class 3B Laser

Join Date: Jan 2014
Location: Iraq
Posts: 4,294
Rep Power: 2141
Re: Dr Quantum - Double Slit Experiment

If the double slit experiment doesn't blow your mind, try the quantum eraser delayed choice double slit experiment:

Delayed choice quantum eraser - Wikipedia, the free encyclopedia

What are the implications?

After looking into that with more than a cursory glance and some indepth pondering, read this next:

http://www.science20.com/alpha_meme/...ysics_ii-86125

Read that article with a sincere open mind and your world will be changed, if you haven't already understood it from your own experience. This is why the Pauli-effect, or why the belief in a particular outcome for an experiment can actually change it:

http://www.princeton.edu/~achaney/tm...li_effect.html

OK, if by chance anyone has taken the time to investigate those links and read them in their entirety without a complete rejection, look into this next:

__________________

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

Last edited by Alaskan; 10-11-2014 at 11:09 AM.

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

All times are GMT. The time now is 08:29 AM.

 -- DarkShadows V5 -- Responsive LPF -2562016 -- Default Style Contact Us - Laser Pointer Forums - Archive - Top