How does the process of light transmission occur in various materials, such as glass, water, and air?

Light transmission occurs when light waves pass through a material without being absorbed. In materials like glass, water, and air, light transmission happens because these substances have different refractive indexes that allow light to travel through them. Glass has a higher refractive index than air, which causes light to bend as it enters the glass and then bend again as it exits. Water also has a higher refractive index than air, causing light to bend when it enters and exits the water. In all cases, the speed of light changes as it moves from one material to another, leading to the bending of light rays.