JEE Main 202522 Jan, Morning shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002
The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV, respectively. If we incident a light of wavelength 550 nm on these two metal surfaces, then photo-electric effect is possible for the case of