, where V is the is accelerating potential for two particles A and B, carrying the same charge but different masses m1 and m2 (m1 > m2). Which one of the two represents a particle of smaller mass and why? Given,
Charge (q) is the same but the mass of both particles is different (m1 > m2).
The De-broglie wavelength given by, 
The slope of the graph of λ versus 
= 
The slope of the smaller mass is larger; therefore, plat A in the above graph represents mass m2.
