Exam-style question
Try this first
Which of the following correctly identifies the properties of a photon and its antiparticle?.
- A.Photon has no mass, and its antiparticle is also massless.
- B.Photon has mass, and its antiparticle has negative mass.
- C.Photon has charge, and its antiparticle has opposite charge.
- D.Photon has no charge, and its antiparticle has charge.
Model answer
What a good answer should say
- Photon has no mass, and its antiparticle is also massless.
Explanation
Why this works
Photons are massless particles, and they do not have an antiparticle with mass; they are their own antiparticles.
Common mistake
No common mistake is linked to this question yet.