an electron is moving at 2.5 x 105m/s. Find the electron's De Broglie Wavelength.
De Broglie relates wavelength of electron waves to momentum of the electron by lambda = h/p where h is planck's constant.
The Attempt at a Solution
given the velocity above of 2.5 x 105m/s, I multiplied that velocity by 9.109 x 10-31kg to get momentum (p).
from there i used (4.136 x 10-15eVs) / (9.109 x 10-31kg)(2.5 X 105m/s)
This gives me 18162257108.4 m which is off by many orders of magnitude from the 180pm that the book lists as the answer.
Can someone please show me where i'm going stupid on this one?