Physics

Problem

If the de Broglie wavelength of an electron is equal to

10^{-3}

times the wavelength of a photon of frequency

6 \times 10^{14}

Hz, what is the speed of the electron? a.

1.1 \times 10^6

m/s b.

1.7 \times 10^6

m/s c.

1.8 \times 10^6

m/s d.

1.45 \times 10^6

m/s