. To make white light using a blue light-emitting diode, a yellow light-emitting phosphor is used to absorb and re-emit some of the blue light. This results in some loss in energy efficiency. Why

The teacher is mostly talking about the distillation of a mixture

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Ibelieve the answer is weathering,hope my answer has you : )