In an electron microscope, what accelerating voltage is needed to produce electrons with wavelength 0.0600 nm ? his Planck's constant (6.626×10−34 J seconds), mass of an electron is 9.1×10−31 kg and =1.6x 10−19 λ=mvh⋅λ=2meVh a. 6.32kV b. 632 V c. 0.066 V
