Optics

Nuclear photographic emulsion - a photographic emulsion for recording the trajectories (tracks) of charged particles.

(from the Latin justus — correct), the set of operations that bring measuring instruments into a state ensuring their correct functioning.

Eikonal , (from the Greek eikon — image) in geometrical optics, a function that determines the optical path length of a ray of light between two arbitrary points, one of which, A, belongs to the space of objects and the …

A quantity characterising the difference between two chromaticities.

Methods of measuring colour and expressing it quantitatively.

(L), a non-SI unit of luminance (usually of the luminance of a surface that scatters light), used mainly in the USA.

Lambert's law , the law according to which the luminance L of a light-scattering (diffuse) surface is the same in all directions.

A paraxial beam of light rays, a beam of rays propagating along the axis of a centred optical system and forming very small angles with the axis and with the normals to the refracting and reflecting surfaces of the syste…

At the Lawrence Livermore National Laboratory in the USA, construction has been completed of the world's most powerful laser – the National Ignition Facility. $3.5 billion was spent on the needs of the project, and build…

Mikhail Lukin, professor of physics at Harvard University, and Vladan Vuletić, his colleague from Serbia and professor of physics at the Massachusetts Institute of Technology, have in a unique experiment managed to make …