How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

There are three primary colours of light, which can be combined to make secondary colours. A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow ...

However, as the lowest excited states of semiconducting SWCNTs are in the infrared region, the emission of visible light from SWCNTs should not be possible. Figure 1: Schematic of excited energy ...