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NEET2014ChemistryStructure of AtomActual

Calculate the energy in corresponding to light of wavelength 45   n m : (Planck’s constant h = 6.63 × 10 - 34 J s : s p e e d   o f   l i g h t   c = 3 × 10 8   m s - 1 )

Options

  1. A6.67 × 10 15
  2. B6.67 × 10 11
  3. C4.42 × 10 - 15
  4. D4.42 × 10 - 18

Correct answer

D. 4.42 × 10 - 18

Step-by-step solution

E = h c λ = 6.63 × 10 - 34 × 3 × 10 8 45 × 10 - 9 = 4.4 × 10 - 18

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