When they relax, they emit energy (in this case visible light) at characteristic wavelengths.

Since an electron behaves as a wave, at a given velocity it has a characteristic de Broglie wavelength.

A phase velocity is the speed at which an individual wave travels, having its own characteristic wavelength and frequency.

Each element emits light at a characteristic wavelength, which is dispersed by a grating or prism and detected in the spectrometer.

The excited analyte atoms emit light at characteristic wavelengths that can be dispersed with a monochromator and detected.

These photons have characteristic wavelengths depending on the size of the jump.

Each dimension represents a different characteristic size-like a wavelength, although the analogy's not precise.

The mercury ions emit light at characteristic wavelengths, the relative intensities of which are determined by the pressure of the vapor.

It was first used to analyze the elements in a substance heated to incandescence; each element gave off characteristic wavelengths of visible light.

The acceptor fluorophore in turn emits light at its characteristic wavelength.