Reflectance: meaning, definitions and examples

Used primarily in physics and optics to describe the proportion of light or other radiation striking a surface that is reflected. It is often quantified for materials to understand their reflective properties.

• The reflectance of the material was measured to determine its effectiveness as a solar panel.
• Scientists studied the reflectance of various surfaces to improve the design of reflective coatings.

Used primarily in physics and engineering to describe the proportion of light or other radiation striking a surface and reflecting off it.

• The reflectance of the mirror was measured at different angles.
• Scientists study the reflectance of various materials to improve solar panel efficiency.

Commonly used in astronomy and climatology to describe the proportion of the incident light or radiation that is reflected by a surface, often of celestial bodies or Earth's surfaces.

• The planet's albedo affects its climate and temperature.
• Changes in Earth's surface albedo can influence global warming.

Frequently used in optics and materials science to describe the ability of a surface or material to reflect light or other kinds of radiation.

• The reflectivity of the coating was important in designing the telescope.
• Engineers tested the reflectivity of different materials for the new optical device.