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66. Work function of a metal is4eV .Light of wavelength 1)295nm,2) 305nm,3)315nm, 4)325nm is made to fall on the same metal turn by turn ,which of the following wavelength will cause photoelectric emission Correct option is 1). Only 1)&2) 2). Only 3)&4) 3. all of these 4). None of these

Answer» 66. Work function of a metal is4eV .Light of wavelength 1)295nm,2) 305nm,3)315nm, 4)325nm is made to fall on the same metal turn by turn ,which of the following wavelength will cause photoelectric emission Correct option is 1). Only 1)&2) 2). Only 3)&4) 3. all of these 4). None of these


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