question_answer

The de-Broglie wavelength of an electron having \[80eV\] of energy is nearly             (\[1\,eV=\text{ }1.6\times {{10}^{19}}J,\]  Mass of electron \[=9\times {{10}^{-31}}kg\] Plank’s constant \[=6.6\times {{10}^{-34}}J\text{-}\,\sec \])

A) 140 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

B) 0.14 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

C) 14 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]

D) 1.4 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]