Physics · Dual Nature of Matter and Radiation
Consider a beam of electrons (each with energy E0) incident on a metal surface kept in an evacuated chamber. Which of the following statements is true?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Electrons will only be emitted if E0 is exactly equal to φ.
- 2Electrons can be emitted with any energy up to a maximum of E0 - φ (where φ is the work function).✓
- 3Electrons can be emitted, but all will have the exact same energy E0.
- 4No electrons will be emitted as only photons can cause electron emission.
Correct answer
Electrons can be emitted with any energy up to a maximum of E0 - φ (where φ is the work function).
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