A Photocathode Has a Work Function of 2

question 28

Multiple Choice

A photocathode has a work function of 2.4 eV.The photocathode is illuminated with monochromatic radiation whose photon energy is 3.5 eV.The wavelength of the illuminating radiation is closest to:

• A)350 nm
• B)330 nm
• C)300 nm
• D)380 nm
• E)410 nm

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