Verified Solution • 2025–26 Session moderate

QPage 363: Q7: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Page 363: Q7 Solution: In an experiment on photoelectric effect, a photon is incident…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often incorrectly assume that the photon's momentum must equal the photoelectron's momentum, ignoring that the metal lattice (or atom) absorbs the recoil momentum. To avoid this, always define the system as the photon plus the entire metal target, not just the photon and the single electron.

In an experiment on photoelectric effect, a photon is incident on an electron from one direction and the photoelectron is emitted almost in the opposite direction. Does this violate the principle of conservation of momentum?

Step-by-Step Verified Solution

**Answer:** No, it does not violate the principle of conservation of momentum. **Step-by-Step Explanation:** In the photon-electron collision, the total momentum of the system (photon + electron) is conserved. The photon is incident from one direction and the photoelectron is emitted in the opposite direction, but the net momentum of the system before and after the collision remains the same.

All Questions in this Chapter

QPage 363: Q1 QPage 363: Q2 QPage 363: Q3 QPage 363: Q4 QPage 363: Q5 QPage 363: Q6 QPage 363: Q7 QPage 363: Q8 QPage 363: Q9 QPage 363: Q10 QPage 363: Q11 QPage 363: Q12 QPage 363: Q13 QPage 364: Q1 QPage 364: Q2 QPage 364: Q3 QPage 364: Q4 QPage 364: Q5 QPage 364: Q6 QPage 364: Q7 QPages 363-364: Q1 QPages 363-364: Q2 QPages 363-364: Q3 QPages 363-364: Q4 QPages 363-364: Q5 QPages 363-364: Q6 QPages 363-364: Q7 QPages 363-364: Q8 QPages 363-364: Q9 QPages 363-364: Q10 QPages 363-364: Q11 QPages 363-364: Q12 QPages 363-364: Q13 QPages 363-364: Q14 QPages 365-366: Q1 QPages 365-366: Q2 QPages 365-366: Q3 QPages 365-366: Q4 QPages 365-366: Q5 QPages 365-366: Q6 QPages 365-366: Q7 QPages 365-366: Q8 QPages 365-366: Q9 QPages 365-366: Q10 QPages 365-366: Q11 QPages 365-366: Q12 QPages 365-366: Q13 QPages 365-366: Q14 QPages 365-366: Q15 QPages 365-366: Q16 QPages 365-366: Q17 QPages 365-366: Q18 QPages 365-366: Q19 QPages 365-366: Q20 QPages 365-366: Q21 QPages 365-366: Q22 QPages 365-366: Q23 QPages 365-366: Q24 QPages 365-366: Q25 QPages 365-366: Q26 QPages 365-366: Q27 QPages 365-366: Q28 QPages 365-366: Q29 QPages 365-366: Q30 QPages 365-366: Q31 QPages 365-366: Q32 QPages 365-366: Q33 QPages 365-366: Q34 QPages 365-366: Q35

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Photoelectric Effect and Wave-Particle Duality
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring