Question:medium

When a metal surface is illuminated by light of wavelengths 400nm and 250nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is

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In photoelectric effect: K.E. ∝ v² Always compare energies using velocity ratios.
Updated On: Mar 19, 2026
  • 2h × 10¹4J
  • 6h × 10¹4J
  • 1.5h × 10¹4J
  • 0.5h × 10¹4J
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The Correct Option is B

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