De Broglie wavelength of an electron moving with kinetic energy 144 eV is nearly:
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De Broglie wavelength of an electron moving with kinetic energy 144 eV is nearly:

G1 Physics · Accepted Answer

For an electron, λ(Å) ≈ 12.27/√V when K = eV. V = 144 gives λ = 12.27/12 = 1.0225 Å = 0.10225 nm = 102 × 10⁻³ nm. Answer: A.