Question

a particle having a wavelength 6.6 x 10^-29 cm is moving with a velocity of 10^6 cm sce^-1. find the mass of the particle. planck’s constant =6.62 x 10^-27 erg sce.

Answer 1

Combining the following equations,

E = mc² and E = hc/λ

we get,

m = h/λν

So, m = 6.62 * 10⁻²⁷/ ( 6.6 * 10⁻²⁹ * 10⁶ )

m = 1.003 * 10⁻⁴ g = 0.1 mg