Verified Solution • 2025–26 Session
moderate
QPages 363-364: Q5: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Pages 363-364: Q5 Solution: The equation is valid
⚠️ Common Exam Traps & Conceptual Pitfalls
Students frequently plug $E=pc$ for electrons, overlooking that the correct relativistic formula is $E^2=p^2c^2+m^2c^4$; only when $m=0$ does it simplify to $E=pc$, so the relation holds exclusively for photons, not for massive particles like electrons.
The equation is valid
Multiple Choice Options
- A for an electron as well as for a photon
- B for an electron but not for a photon
- C for a photon but not for an electron
- D neither for an electron nor for a photon
Step-by-Step Verified Solution
**Answer:** (c) for a photon but not for an electron.
**Step-by-Step Explanation:**
E = pc is valid for massless particles (photons). For electrons, E_ = p_c_ + m_c_.
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