![]() The exercise questions of ch 11 Physics Class 12 is divided into two parts: exercise and additional exercise. There are 37 questions discussed in Dual Nature of Radiation and Matter NCERT solutions. Dual Nature of Matter and Radiation Class 12 Solutions to have no physical significance as such.ĭue to the significance of the group speed the absolute value of wavelength has physical significance. The absolute energy has no significance because of the reference point being arbitrary and thus the inclusion of an arbitrary constant rendering the value of and. Q : 11.37 (e) The energy and momentum of an electron are related to the frequency and wavelength of the associated matter wave by the relations: But while the value of is physically significant, the value of (and therefore, the value of the phase speed ) has no physical significance. ![]() Planks constant calculated from the above chart is therefore Planks constant calculated from the above chart is The slope of the above graph will give the Plank's constant divided by the electronic charge. To calculate the planks constant from the above date we plot the stopping potential vs frequency graphįrom the above figure, we can see that the curve is almost a straight line. Where V is stopping potential, h is planks constant, e is electronic charge, is frequency of incident photons and is work function of metal in electron Volts. ![]() The stopping voltages, respectively, were measured to beĭetermine the value of Planck’s constant, the threshold frequency and work function for the material. In our experiment with rubidium photo-cell, the following lines from a mercury source were used: Q: 11.28 A mercury lamp is a convenient source for studying frequency dependence of photoelectric emission since it gives a number of spectral lines ranging from the UV to the red end of the visible spectrum. ![]()
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