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A beam of light has two wavelength 4972 and 6216 A with a total intensity...

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A beam of light has two wavelength 4972 and 6216 A with a total intensity of 3 6 x 10 3 Wm 2 equally distributed among the two wavelengths The beam falls normally on an area of 1 cm of a clean metallic surface of work function 2 3 eV Assume that there is no loss of light by reflection and that each capable photon ejects one electron The number of photo electrons liberated in 2s is approximately A B skipped C C 6 x 10 1 9 1011 11 1011 15x 1011 QU 6 Coff MY PE SC 4

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