hi Mr.Doner, I have a question which is related to your example of passing through a door in one of your videos. you said if a person is passing through a door in which that door is acting as a slit then the reason of that person not acting as as wave is because it has very small wavelength compared to slit length, so then what if that person moves that much slow that its wavelength is similar to the size of slit then wouldn't that be enough to act as wave?
hey chris, this video overall is great, quiet a confusing topic though, i was just wondering, how do we derive the 4pi in the Heisenberg uncertainty principle, because then it allows us to understand instead of memorize. You have done magnificent work elaborating upon how we get to the (delta)p*(delta)x=h however the 4pi is rather ambiguous. And technically, when you referred to the energy time conjugate variables, you didn't identify that this was part of something referred to as pair-production.
You mean between two wavefronts? Crests interact a little differently with electrons than do troughs. it gives us a small distinction so that we can tell the electron must be between a crest and a trough. That is we narrowed down its location to this region. We just wanted a reasonable estimate here of where the electron is. We could use a full wavelength or half of a wavelength, it does not matter.
@@donerphysics Sorry, you were right 😅 ... it was around 2-3 am here hehe ... I didn't calculate through it rightly ... thank you for the answer :) I remember watching you in school, you've helped us so much, thank you :)
@@donerphysics sorry for the lack of clarity. I meant to ask that how does the uncertainty principle with regards to energy and time apply to the time of real particles? I understood the implications for virtual particles, but didn't understand what was the "time" for real particles.
@@arhankamath871 The most common example would be the energy levels in an atom. The more decimal places of the excited energy level that we know, the fewer decimal places we can know about how much time the electron spends in the excited state.
I am introducing the uncertainty principle to high school students, so I begin with a discussion relating to something that most of them understand. They understand precision of measuring equipment, and they can imagine "the most precise equipment ever possible." As a teacher, one always has to make decisions as to whether to teach the deepest truth we know, or to help students make a beginning in a complex topic.
When I get a chance I will fix the mistake on the IB question where I say that the momentum ranges to 10 to the power +20 rather than -20.
a god among men thank you sir
the uncertainty that I will get a 7 is certainly less than Heisenberg's
did u ever get that 7
I am truly loving your work. Thank you
You are so welcome
at 12:00 if DeltaE*Deltat
this is so helpful thank you so much
hi Mr.Doner, I have a question which is related to your example of passing through a door in one of your videos. you said if a person is passing through a door in which that door is acting as a slit then the reason of that person not acting as as wave is because it has very small wavelength compared to slit length, so then what if that person moves that much slow that its wavelength is similar to the size of slit then wouldn't that be enough to act as wave?
It is something to think about. The person would be moving infinitely slowly
hey chris, this video overall is great, quiet a confusing topic though, i was just wondering, how do we derive the 4pi in the Heisenberg uncertainty principle, because then it allows us to understand instead of memorize. You have done magnificent work elaborating upon how we get to the (delta)p*(delta)x=h however the 4pi is rather ambiguous. And technically, when you referred to the energy time conjugate variables, you didn't identify that this was part of something referred to as pair-production.
Not needed.
@ 11:50 , its supposed to be greater than not less than. right?
Why is it that the electron must be between two electrons at 3:23?
You mean between two wavefronts? Crests interact a little differently with electrons than do troughs. it gives us a small distinction so that we can tell the electron must be between a crest and a trough. That is we narrowed down its location to this region. We just wanted a reasonable estimate here of where the electron is. We could use a full wavelength or half of a wavelength, it does not matter.
08:05 isn't the answer B? delta p * h/p = h/4*pi => delta p =4*pi/p
No. Why are you bringing the 4pi from the denominator to numerator?
@@donerphysics Sorry, you were right 😅 ... it was around 2-3 am here hehe ... I didn't calculate through it rightly ... thank you for the answer :) I remember watching you in school, you've helped us so much, thank you :)
I dont get what you mean by "know more/ less about the wavelength"
The more precisely you know the wavelength.
What exactly is the "time" here?
where? ...at what time in the video?
@@donerphysics sorry for the lack of clarity. I meant to ask that how does the uncertainty principle with regards to energy and time apply to the time of real particles? I understood the implications for virtual particles, but didn't understand what was the "time" for real particles.
@@arhankamath871 The most common example would be the energy levels in an atom. The more decimal places of the excited energy level that we know, the fewer decimal places we can know about how much time the electron spends in the excited state.
@@donerphysics okay. Thank you!!
The uncertainty principle has nothing to do with precision of the equipment you use (check you statement at 4:18).
I am introducing the uncertainty principle to high school students, so I begin with a discussion relating to something that most of them understand. They understand precision of measuring equipment, and they can imagine "the most precise equipment ever possible." As a teacher, one always has to make decisions as to whether to teach the deepest truth we know, or to help students make a beginning in a complex topic.