Question

18. An electron beam has a kinetic energy equal to
100 eV. Find its wavelength associated with a
beam, if mass of electron = 9.1 x 10-31 kg and
1 eV = 1.6 x 10-19 J. (Planck's constant =
6.6 * 10-34 J-s)
(1) 24.6 A
(2) 0.12 A
(3) 1.2 Å
(4) 6.3 Å​

Answer 1

Answer:

$\huge\underline\bold\red{(2) 0.12 A}$$<marquee>Is the correct answer$