👉 "Reflectivity" is a term in physics that refers to a material's ability to reflect light. This property can be used to determine how well a material reflects certain wavelengths of light, as these wavelengths are often used in various applications such as photography and radar systems. In simple terms, reflective materials allow light to bounce off them, which means they reflect the light back towards themselves. For example, a mirror is a reflective material that allows all visible light waves to pass through it without any reflection.