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A2 6PH04 Physics Unit 4 'Physics on the Move' - 11th June 2012

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Original post by alexpb333

I've gotten hold of a paper, anyone interested in me uploading it? I'm not sure of all the answers still

Can you upload it here?

Original post by alexpb333

I've gotten hold of a paper, anyone interested in me uploading it? I'm not sure of all the answers still

yea put it here
thanks

Original post by alexpb333

I've gotten hold of a paper, anyone interested in me uploading it? I'm not sure of all the answers still

If you could upload it then I can make a mark scheme with some friends

This was posted from The Student Room's iPhone/iPad App

Plz explain, why electrons can be used to probe the nuclei of atoms

Original post by masum shikder

Plz explain, why electrons can be used to probe the nuclei of atoms

What do you mean by probe???

Posted from TSR Mobile

What typical raw marks do we need to get for an A* grade in this? I can only find A grade boundaries :frown:

:frown:

(edited 11 years ago)

Original post by masum shikder

Plz explain, why electrons can be used to probe the nuclei of atoms

If you fire a beam of electrons at atoms, you can get diffraction patterns which can be used to investigate the structure of atoms. So the electrons need a high momentum so they have a small enough wavelength to have a good amount of diffraction with the small gaps of atoms

edit:
a beam of electrons will act like a wave. the higher the momentum of the electrons, the shorter the wavelength

\lambda = \frac{h}{\rho}

(edited 11 years ago)

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