Quantum computers have the potential to solve complex problems that would be impossible for the most powerful classical ...

Two-photon technology, which relies on overlapping ... and it must have widely separated absorption, emission and fluorescence spectra. Materials that meet these criteria now exist and can be ...

For Absorption Spectrometer: 5mm white-light LED (light emitting ... The right picture shows the visible spectrum of the sun lighting the blinds of the room. Specifics About CFL Emission Lines and ...

Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the bright hydrogen emission lines. Key fact Line emission spectra are ...

This means that each electron transition will produce a photon of a different frequency and hence a different colour. This causes line emission spectra to be produced, as shown below. This is not ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion nanoparticles (Ln/Yb-UCNPs, Ln3+=Ho3+, Er3+, Tm3+). In the design, Ln³⁺ ions are ...