Which particle has the largest de Broglie wavelength?
an electron moving at 3×103 m s−13 \times 10^3\text{ m s}^{-1}3×103 m s−1
a proton moving at 3×103 m s−13 \times 10^3\text{ m s}^{-1}3×103 m s−1
an electron moving at 6×105 m s−16 \times 10^5\text{ m s}^{-1}6×105 m s−1
a proton moving at 6×105 m s−16 \times 10^5\text{ m s}^{-1}6×105 m s−1
