<p>If&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>E</mi><mn>1</mn></msub><mo>,</mo><mo>&#160;</mo><msub><mi>E</mi><mn>2</mn></msub><mo>&#160;</mo><mi>a</mi><mi>n</mi><mi>d</mi><mo>&#160;</mo><msub><mi>E</mi><mn>3</mn></msub></math>&nbsp;represent respectively the kinetic energies of an electron, an alpha particle and a proton each having same de Broglie wavelength then:</p>