Question

The photoelectric effect is good evidence for blank.

the wave nature of EM radiation, because it shows how wave amplitude is proportional to quanta of energy
referred to as photons

neither the wave nor the particle nature of light, because results vary based on the frequency of light used

both wave and particle nature, because it blends photons with electrons

the particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy
referred to as photons

Answer 1

The photoelectric effect is good evidence for **the particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy referred to as photons**.

This phenomenon demonstrates that light can behave as a stream of particles (photons), where the energy of each photon is proportional to its frequency, supporting the idea that light has particle-like properties.