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...energy (usually from electromagnetic radiation or light). When lanthanides are illuminated with visible light, their electrons absorb the energy contained within the incoming photons of light, and most of this energy is, in turn, emitted in the form of light within the visible and near-infrared range of the electromagnetic spectrum. In medical imaging,...

...and has published over 70 peer-reviewed papers in journals of high-scientific standing. He currently chairs the UK-node of the NASA Solar System Exploration Research Virtual Institute (SSERVI) comprising of over 100 members from 15 UK higher education institutions. In the video below, Mahesh discusses the far side of the moon and why we need samples from it. Transcript...

...energy and with the components for growth and repair. In this free course, Obesity: balanced diets and treatment, you will examine the various roles of nutrients within the body and look at the effects of nutrient deficiencies or excesses, both of which can lead to adverse health effects. This OpenLearn course provides a sample of level 2 study in Biology...Obesity:...

...energies remained the same. Decreasing the wavelength of the light, however, caused the electrons to be emitted with a higher maximum energy. Conversely, increasing the wavelength of the light beyond a particular cut-off value (specific to each metal), caused the emission of electrons to cease. The explanation was that light interacts with matter as if it is composed of a...

...Solar System like? Could there be life on them? Learn about this fascinating area of twenty-first century science in this exciting free course, An introduction to exoplanets. The course introduces our Galaxy's population of planets, and some of their many surprises. It explains the methods used by astronomers to study exoplanets, and provides a general introduction to the...