Question

23. Calculate the kinetic energy of an a-particle which has a wavelength of 12pico meter​

Answer 1

U know the formulae of kinetic energy = 1/2.mv^2 now here u have mass and lambda .

use this formulae lambda=velocity of light in vacuum/frequency

Here u get v(frequency) .And then put the values u get the answer.

lambda=c/v

12×10^-12=3×10^8/v

v=2.5×10^19

kinetic energy=1/2.mv^2

=1/2×6.64*10^-27*2.5×10^19

=8.3×10^-8 J

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