electron mass m = 9.1 × 10^–31 kg)

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A beam of electrons of energy E scatters from a target having atomic spacing of 1 Å. The first maximum intensity occurs at θ = 60°. Then E (in eV) is ______. (Planck constant h = 6.64 × 10^–34 Js, 1 eV = 1.6 × 10^–19 J, electron mass m = 9.1 × 10^–31 kg)
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A beam of electrons of energy E scatters from a target having atomic spacing of 1 Å. The first maximum intensity occurs at θ = 60°. Then E (in eV) is ______. (Planck constant h = 6.64 × 10^–34 Js, 1 eV = 1.6 × 10^–19 J, electron mass m = 9.1 × 10^–31 kg) [...]
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Tags: 1 eV = 1.6 X 10^-19 J ) , A beam of electrons of energy E scatters from a target having atomic spacing of 1 Å. The first maximum intensity occurs at θ = 60°. Then E (in eV) is ______. (Planck constant h = 6.64 × 10^–34 Js , electron mass m = 9.1 × 10^–31 kg) ,