Which of the following pairs of physicists and their contributions/discoveries is INCORRECT?

The correct option is Galileo Galilei – Wave theory of light.

Explanation:
Let us analyze the contribution of each physicist listed in the options:

1. Heinrich Rudolf Hertz – Generation of electromagnetic waves: Heinrich Hertz experimentally proved the existence of electromagnetic waves in 1887 by generating and detecting them in his laboratory, confirming Maxwell's theoretical predictions. Thus, this pair is correct.

2. Albert Einstein – Explanation of photoelectric effect: Albert Einstein successfully explained the photoelectric effect in 1905 using the light quantum hypothesis (photons), which earned him the Nobel Prize in Physics in 1921. Thus, this pair is correct.

3. Michael Faraday – Laws of electromagnetic induction: Michael Faraday discovered electromagnetic induction in 1831 and formulated the fundamental laws linking magnetic fields to induced electromotive force. Thus, this pair is correct.

4. Galileo Galilei – Wave theory of light: The wave theory of light was proposed by Dutch physicist Christiaan Huygens in 1678 (and later expanded by Thomas Young and Augustin-Jean Fresnel). Galileo Galilei is known for his monumental work in observational astronomy, kinematics, telescopes, and classical motion, not the wave theory of light. Thus, this pair is INCORRECT.

Therefore, the incorrect pair of physicist and contribution is Galileo Galilei – Wave theory of light.