Question

Who discovered the photoelectric effect?

Hint:

Remember that the photoelectric effect supports the quantum theory of light, leading to the concept of photons.

Answer 1

Step 1: The photoelectric effect is the phenomenon in which light incident on a metal surface ejects electrons. Step 2: Albert Einstein explained this effect by proposing the quantization of light energy in the form of photons. Step 3: This discovery confirmed the particle nature of light and won Einstein the Nobel Prize in Physics in 1921. \[ \therefore \text{The correct answer is: Albert Einstein.} \] \[ \boxed{\text{Albert Einstein}} \]