Class/Course - Class XII

Subject - Physics

Chapter - Dual Nature of Radiation and Matter

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Q.1 The light sensitive compound on most photographic films is silver bromide AgBr. A film is exposed when the light energy absorbed dissociates this molecule into its atoms. The energy of dissociation of AgBr is 105 J mol-1. For a photon that is just able to dissociate a molecule of AgBr, the photon energy is
  1.04 eV
  2.08 eV
  3.12 eV
  4.16 eV