# Physics AS - help

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#1
In the syllabus it says
''understand the need for a wave model when explaining electron diffraction"
So how do I explain it then?
0
16 years ago
#2
(Original post by etomac)
In the syllabus it says
''understand the need for a wave model when explaining electron diffraction"
So how do I explain it then?
When an electron beem is projected towards a double slit ( Thin slits , very closely spaced) and the projection is recorded on a film, an interference pattern develops. This interference pattern cannot be explained through the particle model of teh electron, and thus electrons must sometimes be treated as waves. Just as with light, electrons come as both particles and waves, depending on your measurement. The amplitide of an electron wave at a point, when squared, is proportional to the probability of finding an electron at that point.
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#3
thanks
0
16 years ago
#4
Yeah sounds like theyre after the phrase "wave particle duality"

What exam board is it by the way?
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#5
Edexcel AS Physics (Salters)
Module 2: SURgery
0
16 years ago
#6
(Original post by etomac)
thanks
No problem
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16 years ago
#7
(Original post by etomac)
Edexcel AS Physics (Salters)
Module 2: SURgery
thought i recognised the learning outcome lol
im doing Edexcel B, which is probly real similar, its also salters
sitting A2 this summer, did AS last year

so if you want any help just ask
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16 years ago
#8
(Original post by Jonatan)
When an electron beem is projected towards a double slit ( Thin slits , very closely spaced)
Are crystals not used for electron diffraction?
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16 years ago
#9
(Original post by hitchhiker_13)
Are crystals not used for electron diffraction?
practically, yes. but theoretically, it is called "the double slit".
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