Question

Protons can be accelerated in particle accelerators. Calculate the wavelength (in Å)of such accelerated proton moving at 2.85 × 108 ms^-1 (the mass of proton is 1.673 x 10^-27 Kg).

Answer 1

m = mass of the proton = 1.673 x 10^-27 Kg 

v = velocity of the proton = 2.85 x 10⁸ ms^-1 

λ = h/mv

= h = Planck’s constant = 6.626 x 10³⁴ Kg m²s^-1

Wavelength of proton = λ = 1.389 x 10^-15 m.