The work functions of Cesium and Platinu

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Target Exam

CUET

Subject

Physics

Chapter

Dual Nature of Radiation and Matter

Question:

The work functions of Cesium and Platinum are 1.9 eV and 5.7 eV, respectively. The ratio of their threshold wavelengths, respectively is

Options:

1 : 3

3 : 1

1 : 9

9 : 1

Correct Answer:

3 : 1

Explanation:

The correct answer is Option (2) → 3 : 1