Question:medium

When a metal surface is illuminated by light of wavelength 400 nm and 250 nm, the maximum velocities of the photoelectrons ejected are v and 2v respectively. The work function of the metal is (h = Planck’s constant, c = velocity of light in air)

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Higher frequency light increases kinetic energy, not work function.
Updated On: Mar 20, 2026
  • \(2hc \times 10^6\ \text{J}\)
  • \(1.5hc \times 10^6\ \text{J}\)
  • \(hc \times 10^6\ \text{J}\)
  • 0.5hc × 10⁶ J
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The Correct Option is C

Solution and Explanation

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