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NEET2007PhysicsDual Nature of MatterActual

What is the energy of photon whose wavelength is (6840 Å ) ?

Options

  1. A(1.81 ~eV )
  2. B(3.6 ~eV )
  3. C(-13.6 ~eV )
  4. D(12.1 ~eV )

Correct answer

A. (1.81 ~eV )

Step-by-step solution

( =6840 Å ) ( v = c h v = h c ; h c=12400 eV Å ) Energy of the photon (= 12400 eV Å 6840 Å =1.81 Å )

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