Which of the following phenomena is NOT explained by wave optics?

Which of the following phenomena is NOT explained by wave optics?

Step 1: Understand what wave optics is. Wave optics explains phenomena related to light behaving as a wave, such as interference and diffraction.
Step 2: Identify the phenomena mentioned in the question. We need to find out which one is not explained by wave optics.
Step 3: Recall the photoelectric effect. This is when light causes electrons to be emitted from a material.
Step 4: Recognize that the photoelectric effect is explained by quantum mechanics, which focuses on the particle nature of light (photons).
Step 5: Conclude that since the photoelectric effect is explained by quantum mechanics and not by wave optics, it is the correct answer to the question.

No concepts available.