Question

The speed of an electron is 1.68*10^8m/s what is the wavelength

Answer 1

Answer:

$\lambda =4.33x10^{-12}m=4.33pm$

Explanation:

Hello there!

In this case, since the speed, wavelength and mass of an electron are related via the the Broglie wavelength:

$\lambda =\frac{h}{m*v}$

Thus, by plugging in the mass of the electron and the Planck's constant, we obtain the following wavelength:

$\lambda =\frac{6.626x10^{-34}J*s}{9.11x10^{-31}kg*1.68x10^{8}m/s}\\\\\lambda =4.33x10^{-12}m=4.33pm$

Best regards!