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Smt. Gadade G.D.
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Posted 5 year ago
Smt. Gadade G.D. 
We cannot see proton, electron,neutron what is use of learning of this point ?
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Seema Kumari
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Posted 5 year ago Seema Kumari Gurushala Teacher Coach

We can never see the subatomic particles directly, but can only infer from observation of such indirect effects like tracks. If there are many of them and they are emitting some radiation, and also if we shine some radiation on then and receive back the response this will also constitute a kind of seeing. In 1911 Ernest Rutherford who performed many experiments to explore radioactivity did an experiment in which he discovered that the atom must have a concentrated positive center charge that contains most of the atom's mass. He suggested that the nucleus contained a particle with a positive charge the proton.