undulatory theory (noun)

1. The undulatory theory is often referenced in horror movies to create eerie and supernatural lighting effects.

2. In the animated series, the character used the undulatory theory to conjure colorful waves of light.

3. The futuristic spaceship relied on the undulatory theory to project advanced laser beams for defense.

4. During the early 19th century, the undulatory theory revolutionized the understanding of light and laid the foundation for modern physics.