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 ...

However, both of these spectra contain emission lines that can't yet be matched with known electron transitions, limiting the information which can be gathered from them. In a study published in ...

To do this, they measured the photoluminescence spectrum of a WS 2 sample ... the optical gain and amplified spontaneous emission originate from the electron-hole plasma state in the highly ...

An electron can be excited when its absorbs ... The emission of radiation can be analysed by an ‘emission spectrum’. The different coloured lines show the frequencies emitted by electrons ...