Light of wavelength produces a stopping potential of for a certain metal surface

PHYSICS · Subjective · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

Light of wavelength

540\,\text{nm}

produces a stopping potential of

0.40\,\text{V}

for a certain metal surface. (i) Calculate the threshold wavelength for this metal. (ii) If the same surface is illuminated by light of wavelength

360\,\text{nm}

, determine the expected stopping potential. (iii) Would light of wavelength

700\,\text{nm}

be able to eject photoelectrons from this metal? Give a quantitative reason for your answer.