Wave-particle duality of light refers to light behaving as both a particle and wave depending on the situation. The photoelectric effect provides evidence for light's particle nature by ejecting electrons from metal when photons with sufficient energy strike. Young's double slit experiment supports light's wave nature through the interference of coherent waves which increases light intensity, demonstrating its wave-like properties.

1. What does “wave-particle duality” of light mean?
What are some of the evidence supporting the wave theory of light?
What are some of the evidence supporting the particle theory of light?
Solution
Wave particle duality means behavior or light both as particle as well as wave in different cases.
Photoelectric effect shows the particle nature of light in which light as a packet of photons
incidents on a metal and it will eject a photon of energy less then that of incident photon.
Young's double slit experiment supports the wave nature of light in which interfere of coherent
wave sources increase the amplitude and intensity of light. That shows that light have wave like
property.