Question

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

Answer 1

`\lambda =4.33x10^(-12)m=4.33pm`

Step-by-step explanation:

Hello there!

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

`\lambda =(h)/(m*v)`

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

`\lambda =(6.626x10^(-34)J*s)/(9.11x10^(-31)kg*1.68x10^(8)m/s)\\\\\lambda =4.33x10^(-12)m=4.33pm`

Best regards!