It is possible that the neutral test card instructions include a correction for specular reflections.

The specular reflection off the surface of glass or plastic is about 4-5% of the incident light.

An object's specular reflection can be captured using computer controlled lights and sensors.

Many common materials exhibit a mixture of specular and diffuse reflection.

Waves other than visible light can also exhibit specular reflection.

A perfect sail is flat and has 100% specular reflection.

This refers to elastic scattering rather than to a specular reflection.

This provides uniform lighting and reduces specular reflection, keeping glare low.

This form of the potential guarantees a specular reflection on the boundary.

The radar echo is generated by specular reflections from the sea surface.