Which of the following can penetrate the deepest ( explain)
a) 3mev electron
b) 10mev alpha
c) 0.1 mev auger
d) 400kev proton

3MeV electron

Explanation:

m_e={9.1\times 10^{-31}      m_α=4\times m_e    m_a={9.1\times 10^{-31}

m_p=1.67\times 10^{-27}

(a)  K.E. Energy of electron ==3MeV

=1.05\times10^{18}

(b) K.E. Energy of alpha particle ==10MeV

=0.88\times10^{18}

(c) K.E. Energy of auger particle ==0.1MeV

=0.035\times10^{18}

(d)  K.E. Energy of proton particle ==400keV

=0.766\times10^{14}

from (a),(b),(c),and (d) we can clearly say that the velocity of the electron is more so the penetration of the electron will be deepest.

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