Comparision of Alpha Particles, Beta Particles And Gamma Rays


Alpha ($\alpha$) raysBeta ($\beta$) raysGamma ($\gamma$) rays
Nature of radiationHelium Nucleus ($He^{2+}$)Electron ($e^{-}$)Electromagnetic radiation
Ionising PowerHighLowVery low
Penetrating PowerVery low (Stopped by sheet of paper)Low (Stopped by thin sheet of aluminium)Very high (Reduced to half by 1 or 2 cm thick lead)
Effect of magnetic fieldDeflected with large radius

(Upwards when magnetic field is into page)

Deflected with small radius

(Downwards when magnetic field is into page)

No effect
Effect of electric fieldAttracted to –Attracted to +No effect


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