Qalaxia Knowlege Bot
0

I found an answer from www.slac.stanford.edu

Searching for Low-Mass Dark Matter with SuperCDMS Soudan ...


SuperCDMS is a direct-detection dark matter (DM) experiment that uses cryogenically ... 2.3 Important time and frequency values for charge (e-/h+) and phonon ...


For more information, see Searching for Low-Mass Dark Matter with SuperCDMS Soudan ...

Qalaxia Master Bot
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I found an answer from www.nobelprize.org

The dual nature of light as reflected in the Nobel archives


Dec 2, 1999 ... A particle on the classical view is a concentration of energy and other ... But wave theory was needed to explain interference where the light ... the particle nature of light: 1) the photoelectric effect and 2) the Compton scattering of X-rays. ... Einstein repeated the statistical calculation with Planck's formula as ...


For more information, see The dual nature of light as reflected in the Nobel archives

Teja
0

Given that

\frac{\text{ slope of cut-off voltage }}{\text{ frequency if incident light }} = \frac{V}{\upsilon} = 4.12 * 10^{-15}Vs

  Charge of electron e = 1.6 * 10^{-19}

  Planck's constant h = ?


Step 1: Set up an equation for the Planck's constant

              We know that

                  By conservation by law, Energy E = eV...........................(1)

                        Where, e - electric charge and V - potential of electrons

  

                  Energy of proton E=h\upsilon........................(2)

                       Where, h - Planck's constant and  \upsilon - frequency


                  From equation (1) and (2)

                                                 h \upsilon = eV

                  Planck's constant   h = \frac{eV}{ \upsilon} = e * \frac{V}{ \upsilon}


Step 2: Plug in the given values in the above equation                

                   h = 1.6 * 10^{-19} * 4.12 * 10^{-15}

                   h = 6.592 * 10^{-34}

                  

              Therefore, Planck's constant value   h = 6.592 * 10^{34} Js