Question $7$

$7.$ A proton is roughly $1800$ times more massive than an electron. If a proton and an electron have the same kinetic energy,

the wavelength of the electron will be about $\backslash (\backslash$sqrt$\{1800\}\backslash )$ times longer than the wavelength of the proton.

the wavelength of the electron will be about $1800$ times longer than the wavelength of the proton.

the wavelength of the proton will be roughly equal to the wavelength of the electron.

the wavelength of the proton will be about $1800$ times longer than the wavelength of the electron.

the wavelength of the proton will be about $\backslash (\backslash$sqrt$\{1800\}\backslash )$ times longer than the wavelength of the electron.