الصوت والضوء: انكسار الضوء

The video tutorial explains the concept of light refraction, illustrating how straight objects appear bent when partially submerged in water, and how the sun appears oval at dusk and dawn. It discusses the absolute refractive index, which measures how much a medium slows down light, and provides examples of refractive indices for different materials, such as vacuum and water. The tutorial highlights the impact of medium density on light speed and direction.

What new insight or understanding did you gain from this video?