How did scientists' understanding of light change after the 1600s regarding refraction?

• A. They believed light is composed of particles.
• B. They began to believe light acts as waves.
• C. They dismissed previous theories about light altogether.
• D. They concluded light does not refract.

Answer: (B)

Scientists' understanding of light underwent significant changes after the 1600s, particularly in the context of refraction. The idea that light behaves as waves was a pivotal development in the study of optics.

In the 1600s, researchers like René Descartes explored the phenomenon of refraction, which occurs when light changes direction as it passes from one medium to another, such as from air to water. This led to the formulation of laws governing the behavior of light, such as Snell's Law. The wave theory was further advanced in the 19th century with the work of Thomas Young, who conducted experiments that demonstrated the wave-like properties of light, such as interference and diffraction.

Understanding light as a wave helped explain the behaviors observed during refraction in a more comprehensive manner, thereby leading to a better grasp of optical phenomena. This wave theory of light, which describes how light can propagate and interact with materials, continues to be a foundational concept in the study of physics today.