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NEETChemistryStructure of Atom

Threshold frequency, ν 0 is the minimum frequency which a photon must possess to eject an electron from a metal. It is different for different metals. When a photon of frequency 1.0×10 15 s –1 was allowed to hit a metal surface, an electron having 1.988 × 10 –19 J of kinetic energy was emitted. Calculate the threshold frequency of this metal. Show that an electron will not be emitted if a photon with a wavelength equ

Options

  1. AThreshold frequency = 5 × 10 14 Hz; No electron will be emitted.
  2. BThreshold frequency = 1.0 × 10 15 Hz; No electron will be emitted.
  3. CThreshold frequency = 1.0 × 10 14 Hz; An electron will be emitted.
  4. DThreshold frequency = 2.988 × 10 15 Hz; An electron will be emitted.

Correct answer

A. Threshold frequency = 5 × 10 14 Hz; No electron will be emitted.

Step-by-step solution

Correct Option is : (A) Threshold frequency = 5 × 10 14 Hz; No electron will be emitted.

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