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The work function of a material is found to be 4 eV. Electromagnetic radiation of
frequency 6.8* 10 ^ 15 * Hz falls on it. What is the required potential to stop the
photoelectrons?

The work function of a material is found to be 4 eV. Electromagnetic radiation of
frequency 6.8* 10 ^ 15 * Hz falls on it. What is the required potential to stop the
photoelectrons?

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