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AP EAMCET202119 Aug 2021Evening ShiftChemistryStructure of AtomActual

Assuming that the incident radiation is capable of ejecting photo electrons from all the given metals, the lowest kinetic energy of the ejected photoelectron is observed with which of the given metals?

Options

  1. AN a
  2. BL i
  3. CA g
  4. DC u

Correct answer

D. C u

Step-by-step solution

According to the Einstein's theory of photoelectric effect, for the photoelectric effect to occur, the energy of incident radiation should be greater or equal to the threshold energy called work function of the metal. The equation can be illustrated as: hν   =   φ   +   KE hν   -   φ   =     KE Now, from above relation it can be said that more will be the work function ( φ ) of the metal, lesser will be the kinetic energy of the ejected photo

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