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Homework Statement
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The Attempt at a Solution
(a) : There is no interference. (b) : Interference
And i don't know how to approach (c), (d)
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Consider the wavefunctions in each case and the probability distribution at the screen that they entail.And i don't know how to approach (c), (d)
(c) is just sum of l+> + l> so the answer is same with (b), and i don't know if there is interference between l+> and l+>Consider the wavefunctions in each case and the probability distribution at the screen that they entail.
In case (c), if you were to measure an electron's spin with another SternGerlach machine, would you be able to tell through which slit the electron emerged?is just sum of l+> + l>
I think , in case of (c) , there would be same amount of electron goes through each slit.In case (c), if you were to measure an electron's spin with another SternGerlach machine, would you be able to tell through which slit the electron emerged?
What about if you did the same with an electron in case (d)?
My question to you was not about amounts of electrons.think , in case of (c) , there would be same amount of electron goes through each slit.
up spin go through upper slitMy question to you was not about amounts of electrons.
1. Suppose in case (c) you measured the spin of an electron to the right of the slits and you found it is "up". Would you be able to tell through which slit it went through?
2. Suppose in case (d) you measured the spin of an electron to the right of the slits and you found it is "up". Would you be able to tell through which slit it went through?
I think in (c), upper slit ( + ) and lower slit (  ) will interfere each other, and similarly, upper slit (+) and lower slit(+) will interfere each other in (d).So in (c) you know through which slit the electrons have passed through, but in (d) you do not know. Can you put it together now in view of your answers in (a) and (b) and what you know about quantum interference?
It's not a matter of intensity. If the electron flux is the same in all four cases, then what do you think should be the same in all four graphs?But, is it right that i have to draw a half intensity in (c),(d) compared to (a),(b)