This is a bit of a tricky question because it implies a direct connection between Hertz's work and Einstein's work that isn't entirely accurate. Here's a breakdown:

Heinrich Hertz's Contribution:

* Demonstrated the existence of electromagnetic waves: Hertz's experiments in the 1880s were crucial in proving Maxwell's theory of electromagnetism. He generated and detected radio waves, confirming that light was indeed a form of electromagnetic radiation.

* Focused on wave-like properties: Hertz's experiments primarily focused on demonstrating the wave nature of electromagnetic radiation. He observed interference, diffraction, and polarization, all of which are characteristic of waves.

Albert Einstein's Contribution:

* Photoelectric effect: Einstein's explanation of the photoelectric effect in 1905 revolutionized the understanding of light. He proposed that light could also behave as particles, called photons.

* Quantized energy: The photoelectric effect demonstrated that light energy was not continuous but came in discrete packets, or quanta, of energy. This energy was proportional to the frequency of the light, explaining why only light above a certain frequency could eject electrons from a metal surface.

Connection:

While both Hertz and Einstein contributed to the understanding of electromagnetic radiation, their work focused on different aspects:

* Hertz: Demonstrated the wave-like nature of light.

* Einstein: Explained the particle-like nature of light (the photoelectric effect).

The Key Point:

Einstein's work built upon Hertz's discoveries. Hertz's experiments paved the way for understanding the wave-like nature of light, which then led to Einstein's groundbreaking realization that light could also behave as particles.

Therefore, it's incorrect to say that Hertz "showed" electromagnetic waves acting as particles. He showed their wave-like behavior. It was Einstein who introduced the idea of light as a wave-particle duality.