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The wave length of an probe is volubly a measure of the size of a structure that it can probe in some detail. The quark structure of protons and neutrons appear at the last minute length - scale of 105m or less. This structure was first probed in early 1970's using high energy electron beam produced by a linear acceleration at stanford USA. guess what might have been the order of energy of these electron beams . (Rest mass energy of electron =0.511Mev)

The electron energies from the accelerator must been few KevThe electron energies from the accelerator must been few MevThe electron energies from the accelerator must been few BevThe electron energies from the accelerator must been few Gev

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