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JEE Main2009ChemistryStructure of AtomActual

Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 10^3 ~ms ⁻¹ (Mass of proton =1.67 10⁻²⁷ ~kg and h =6.63 10⁻³⁴ Js ):

Options

  1. A0.032 ~nm
  2. B0.40 ~nm
  3. C2.5 ~nm
  4. D14.0 ~nm

Correct answer

B. 0.40 ~nm

Step-by-step solution

= h mv = 6.63 10⁻³⁴ 1.67 10⁻²⁷ 10^3 0.40 ~nm

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