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NEST2021PhysicsDual Nature of Matter

In a photoelectric setup electrons of maximum kinetic energy 0.5 eV and 1.3 eV are liberated when ultraviolet light of wavelengths 310 nm and 250 nm respectively are employed. Then the calculated value of the Planck constant is closest to

Options

  1. A4.5 10⁻³⁴ ~J ~s
  2. B7.5 10⁻³⁴ ~J ~s
  3. C5.5 10⁻³⁴ ~J ~s
  4. D6.5 10⁻³⁴ ~J ~s

Correct answer

C. 5.5 10⁻³⁴ ~J ~s

Step-by-step solution

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