1. Tardigrade
  2. Question
  3. Physics
  4. The work functions of four materials M1, M2, M3 and M4 are 1.9 eV , 2.5 eV , 3.6 eV, and 4.2 eV, respectively. Which of these material is (are) useful in a photocell to detect visible light?

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Q. The work functions of four materials $M_{1}, M_{2}, M_{3}$ and $M_{4}$ are $1.9 \,eV , 2.5 \, eV , 3.6 \,eV$, and $4.2 \, eV$, respectively. Which of these material is (are) useful in a photocell to detect visible light?

AMUAMU 2014Dual Nature of Radiation and Matter

Solution:

The material are useful in a photocell to detect visible light $ M_{1} $ and $ M_{2} $ .