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<blockquote data-quote="freyar" data-source="post: 6674777" data-attributes="member: 40227">Just going to start with a couple of the fast ones to get rolling, then I'll see if I can get back to this toward the end of the day.&nbsp; Keep the questions coming!&nbsp; These are great so far!Pretty much this. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=";)" title="Wink&nbsp; &nbsp; ;)"&nbsp; data-smilie="2"data-shortname=";)" />&nbsp; But I'll try to answer some of Umbran's specific questions.&nbsp; To get it out of the way, you're going to have to physically do something to the apparatus --- &quot;looking at it funny&quot; isn't going to do it.&nbsp; But, yes, making the slits different sizes is one way to do it.&nbsp; You have more options if you send electrons through the experiment rather than photons, since electrons are charged.&nbsp; For example, put a solenoid parallel to the slits between the slits and the screen.&nbsp; Then turn on the solenoid, so there's a magnetic field in it.&nbsp; That will shift the interference pattern around even if the electrons can't enter the region of the solenoid with the magnetic field in it.&nbsp; So, in other words, electrons are barred from entering the solenoid but can still &quot;know&quot; whether there's a magnetic field in the solenoid or not.&nbsp; This is known as the Aharonov-Bohm effect and is a classic example of electromagnetism being used in quantum mechanics.&nbsp; <a href="https://en.wikipedia.org/wiki/Aharonov%E2%80%93Bohm_effect" target="_blank">This wikipedia article</a> is a bit technical but may be interesting.</blockquote>

[QUOTE="freyar, post: 6674777, member: 40227"] Just going to start with a couple of the fast ones to get rolling, then I'll see if I can get back to this toward the end of the day. Keep the questions coming! These are great so far! Pretty much this. ;) But I'll try to answer some of Umbran's specific questions. To get it out of the way, you're going to have to physically do something to the apparatus --- "looking at it funny" isn't going to do it. But, yes, making the slits different sizes is one way to do it. You have more options if you send electrons through the experiment rather than photons, since electrons are charged. For example, put a solenoid parallel to the slits between the slits and the screen. Then turn on the solenoid, so there's a magnetic field in it. That will shift the interference pattern around [I]even if[/I] the electrons can't enter the region of the solenoid with the magnetic field in it. So, in other words, electrons are barred from entering the solenoid but can still "know" whether there's a magnetic field in the solenoid or not. This is known as the Aharonov-Bohm effect and is a classic example of electromagnetism being used in quantum mechanics. [url=https://en.wikipedia.org/wiki/Aharonov%E2%80%93Bohm_effect]This wikipedia article[/url] is a bit technical but may be interesting. [/QUOTE]

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