The work functions of cesium (Cs) and lithium (Li) metals are 1.9… | JEE Main 2025 Physics PYQ

MCQEasyJEE Main 2025 · 22 January, Shift 1Photoelectric Effect

The work functions of cesium (Cs) and lithium (Li) metals are $1.9 \, \text{eV}$ and $2.5 \, \text{eV}$ , respectively. If we incident a light of wavelength $550 \, \text{nm}$ on these two metal surfaces, then photo-electric effect is possible for the case of:

A
Li only
B
Cs only
C
Neither Cs nor Li
D
Both Cs and Li

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