Verified Solution • 2025–26 Session moderate

QPages 363-364: Q6: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Pages 363-364: Q6 Solution: The work function of a metal is . Light of frequency falls on…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students sometimes think the photon must supply twice the work function energy; the correct condition is $h u ge h u_0$, i.e., $ u ge u_0$. Always compare photon energy directly to the work function, not to a multiple of it.

The work function of a metal is hν0h\nu_0. Light of frequency ν\nu falls on this metal. Photoelectric effect will take place only if

Multiple Choice Options

  • A ν≥ν0\nu \geq \nu_0
  • B ν>2ν0\nu > 2\nu_0
  • C ν<ν0\nu < \nu_0
  • D ν<ν0/2\nu < \nu_0/2

Step-by-Step Verified Solution

**Answer:** (a) _ � __. **Step-by-Step Explanation:** Photoelectric effect occurs when the photon frequency is at least the threshold frequency.

All Questions in this Chapter

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