Summary of Dual Nature of Radiation The various phenomena concerning radiation can be divided into...

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Summary of Dual Nature of Radiation The various phenomena concerning radiation can be divided into three parts i The phenomena such as interference diffraction polarisation etc in which there is interaction between radiation and radiation can be explained on the basis of wave nature of radiation The phenomena such as black body radiation photoelectric effect etc in which there is interaction between radiation and matter can be explained on the basis of quantum theory of radiation i e particle nature iii The phenomena such as rectilinear propagation reflection refraction etc in which neither there is interaction between radiation and radiation nor between radiation and matter can be explained with either of the concepts i e either by wave theory or by photon theory 2 x 10 5 6 63 10 19 1 10 5 1 6 63 x 10 34 4 The number of photons of light having waveleng nm which can provide 1 J energy is nearly a 107 photons c 5 x 10 7 photons b 5 x 10 8 photons d 5 x 107 photons Ans c Hint E hc n EX hc 1x 100 x 10 6 626 x 10 34 3 10 5 10 7 5 The atomic transition gives rise to the radiat frequency 10 MHz The change in energy per r atoms taking place would be a 3 99 x 10 6 J c 6 62 x 10 24 J Ans b b 3 99 J d 6 62 x 10 30 J

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Summary of Dual Nature of Radiation The various phenomena concerning radiation can be divided into three parts i The phenomena such as interference diffraction polarisation etc in which there is interaction between radiation and radiation can be explained on the basis of wave nature of radiation The phenomena such as black body radiation photoelectric effect etc in which there is interaction between radiation and matter can be explained on the basis of quantum theory of radiation i e particle nature iii The phenomena such as rectilinear propagation reflection refraction etc in which neither there is interaction between radiation and radiation nor between radiation and matter can be explained with either of the concepts i e either by wave theory or by photon theory 2 x 10 5 6 63 10 19 1 10 5 1 6 63 x 10 34 4 The number of photons of light having waveleng nm which can provide 1 J energy is nearly a 107 photons c 5 x 10 7 photons b 5 x 10 8 photons d 5 x 107 photons Ans c Hint E hc n EX hc 1x 100 x 10 6 626 x 10 34 3 10 5 10 7 5 The atomic transition gives rise to the radiat frequency 10 MHz The change in energy per r atoms taking place would be a 3 99 x 10 6 J c 6 62 x 10 24 J Ans b b 3 99 J d 6 62 x 10 30 J