Question 1:

Wave-particle duality is the concept that:

Explanation: Wave-particle duality is the concept that light and other particles can exhibit both wave-like and particle-like properties, depending on the experimental setup and observation.

Question 2:

The phenomenon of interference and diffraction of light is evidence for:

Explanation: Interference and diffraction are phenomena that can only be explained by considering light as a wave. These phenomena involve the interaction and superposition of light waves, indicating the wave nature of light.

Question 3:

The de Broglie wavelength is associated with:

Explanation: The de Broglie wavelength is associated with the momentum of a particle. It relates the particle's momentum to its wavelength, highlighting the wave-like behavior of particles.

Question 4:

The uncertainty principle, formulated by Werner Heisenberg, states that:

Explanation: The uncertainty principle states that the position and momentum of a particle cannot be simultaneously known with absolute precision. There is a fundamental limit to the simultaneous measurement of these two properties.

Question 5:

The photoelectric effect, observed by Albert Einstein, provides evidence for:

Explanation: The photoelectric effect, where the ejection of electrons from a metal surface occurs when light is incident on it, provides evidence for the particle nature of light. It supports the idea that light is composed of discrete packets of energy called photons.