Question 48
Modern PhysicsThe particle nature of light is demonstrated by the
- A.photoelectric effect.
- B.speed of light.
- C.colours of light.
- D.diffraction of light.
Show the answer and explanation
Answer: A (photoelectric effect.)
Explanation
The photoelectric effect can only be explained if light comes in packets (photons), which shows its particle nature. Diffraction is a wave effect.