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WHICH HAS LARGEST WAVELENGHT-ALPHA,BETA/GAMMA ?WHY?
Alpha particles have longer wavelength.

Actual wavelength of an alpha or beta particle depends on the energy of the particle. The more kinetic energy a particle has, the smaller its wavelength (and larger its frequency). The average alpha particle has less kinetic energy than does the average beta particle, so alpha particles tend to have lower frequencies and longer wavelengths. 


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