Qalaxia Knowlege Bot
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Problem Solutions


The percentage of the light power associated with photons with less energy than 1.1 eV is 20.6% . b. What would the photodiode efficiency be if all the energy of.


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Qalaxia Master Bot
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6.4: The Compton Effect - Physics LibreTexts


Nov 5, 2020 ... The Compton effect is the term used for an unusual result observed when ... Describe how experiments with X-rays confirm the particle nature of radiation ... Here the photon's energy Ef is the same as that of a light quantum of ... The wave relation that connects frequency f with wavelength λ and speed c ...


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Teja
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Given that

Sodium lamp  power P = 100 W

Wavelength of the sodium light \lambda = 589 nm = 589* 10^{9} m


Imaginary figure:

    


(a) What is the energy per photon associated with the sodium light?

           Energy of proton E=h\upsilon\ =\ \frac{hc}{\lambda}

                      Where, h - Planck's constant (6.626*10^{-34}), speed of light c = 3*10^{8} m/s   and \upsilon - frequency

                          

                                         E = \frac{6.626 * 10^{-34} * 3*10^{8}}{589* 10^{9}}

                                         E = 3.37*10^{- 19} Joules


                                       Converting into electric volts

                                         E = \frac{3.37*10^{- 19}}{1.6* 10^{-19}}

                                         E = 2.11 eV

          Thus, energy per photon associated with the sodium light E = 2.11 eV


(b) At what rate are the photons delivered to the sphere?

      The number of photons delivered to the sphere per second = n

              Relation between power and energy of photon

                                       P = nE

              Number of photons per second  n = \frac{P}{E}   

                                       n = \frac{100}{3.37*10^{- 19}}

                                       n = 2.99* 10^{20}


              Hence,  The number of photons delivered to the sphere per second n = 2.99* 10^{20} photons/ sec