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The electric field associated with a light wave is given by E = E0 sin [(1.57 x 107  m-1) (x - ct)]. Find the stopping potential when this light is used in an experiment on photoelectric effect with the emitter having work function 1.9 eV.

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E = E0 sin[(1.57 x 107 m–1) (x – ct)]

W = 1.57 x 107 x C

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