Question

de broglie - 1
de broglie was the first person to propose that particles could be considered as having wave - properties.
specifically, he showed that the wavelength (λ) of a particle is inversely proportional to momentum (p). in this
assignment, you will calculate the constant that relates λ to p.

1. to start this activity, click this link for de broglies experiment below. set up the copper target so

this tab to read rather quickly. then, fire electrons with an energy of 2 kev using the electron gun, the two - slit
device, and the phosphor screen. set the current intensity of the electron gun to at least 1 na.
what is the kinetic energy of the electrons in joules?

Explanation:

Step1: Recall electron - volt to joule conversion

1 eV = 1.6×10⁻¹⁹ J

Step2: Calculate kinetic energy in joules

Given electron energy is 2 MeV. First convert MeV to eV: 2 MeV = 2×10⁶ eV. Then convert eV to J. Kinetic energy $E=(2\times10^{6}\text{ eV})\times(1.6\times 10^{-19}\text{ J/eV}) = 3.2\times10^{-13}\text{ J}$

Answer:

$3.2\times 10^{-13}\text{ J}$