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AP EAMCET2006ChemistryStructure of Atom

The energy of a photon is 3 10⁻¹² ergs. What is its wavelength in nm ? ( h=6.62 10⁻²⁷ ergs-s; c=3 10¹⁰ ~cm / s )

Options

  1. A662
  2. B1324
  3. C66.2
  4. D6.62

Correct answer

A. 662

Step-by-step solution

E=3 10⁻¹² ergs. = ? h=6.62 10⁻²⁷ erg-s c=3 10¹⁰ cms ⁻¹E= h c 3 10⁻²= 6.62 10⁻²⁷ 3 10¹⁰ = 6.62 10⁻²⁷ 3 10¹⁰ 3 10⁻¹² =6.62 10⁻⁵ ~cm =662 10⁻⁷ ~cm =662 10⁻⁹ ~m =662 ~nm

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