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NEET2012PhysicsDual Nature of MatterActual

Calculate the kinetic energy of the electron having wavelength 1 ~nm .

Options

  1. A2.1 eV
  2. B3.1 eV
  3. C1.5 eV
  4. D4.2 eV

Correct answer

C. 1.5 eV

Step-by-step solution

de broglie wavelength, = h ® m k or k= h^ ๑ m ^ = (6.67 10⁻³⁴ )^2 2 9.1 10⁻³¹ (1 10⁻⁹ )^2 =1.5 eV .

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