The photoelectric effect demonstrates which nature of light?

The correct answer is Particle nature.

Key Points

Photoelectric effect:

• The phenomenon in which light energy forces a metal surface to release electrons is called the photoelectric effect.
• When the light hits, it shows the particle theory of light, and light is defined as a stream of photons or energy packets.
• The other phenomena such as interference, diffraction, and polarization can only be explained when the light is treated as a wave wherein the photoelectric effect, line spectra, and the production and scattering of x-rays demonstrate the particle nature of light.

Properties of Lightwaves:

• Not have any charge or we can say that they are neutral.
• Propagate as a transverse wave with both wave and particle nature.
• They move with a velocity the same as that of light i.e. 3 × 10⁸ m/s.
• It contains energy and it also contains momentum.
• They can travel in a vacuum and always travel in a straight line.

Additional Information

•  Crystalline nature refers to the regular, repeating structure of a solid, which can affect how light interacts with it.
  • However, it is not directly related to the photoelectric effect.
•  Wave nature refers to the fact that light can exhibit interference and diffraction patterns, similar to water waves or sound waves.
  • This is important in many areas of physics, but again, not directly relevant to the photoelectric effect.