Which of the following best defines light?

Light is best defined as a form of energy. This concept captures the fundamental nature of light as it travels and interacts with matter. Light is commonly understood through its ability to carry energy, which is evident in various phenomena such as the generation of heat from sunlight, the energy transfer in photosynthesis, and the functioning of solar panels.

While it's true that light can also exhibit wave-like characteristics—demonstrating phenomena such as interference and diffraction—this alone does not fully encompass the broader definition of light. Furthermore, defining light as a solid form of energy or as a particle with mass is not accurate because light is indeed massless and does not exist in a solid state. Overall, identifying light primarily as a form of energy aligns with how it is widely studied and engaged with in various scientific contexts, including physics and optics.