Verified Solution • 2025–26 Session moderate

QJEEM25Phe646: JEE Main 2025 Physics - Class 12 JEEM25Phe646 Solution: The work functions of cesium (Cs) and lithium (Li) metals are…

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

Multiple Choice Options

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

Step-by-Step Verified Solution

E=1240λ=1240550≃2.25\mathrm{E}=\frac{1240}{\lambda}=\frac{1240}{550} \simeq 2.25

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