We say that it becomes ‘excited’. An electron can be excited when its absorbs energy from electromagnetic radiation. Different changes in energy level need different frequencies of ...

The experiments we have made have confirmed this anticipation, and shown that in every case in which light is scattered by the molecules in dust-free liquids or gases, the diffuse radiation of the ...

The ionising effect of radiation is used in the Geiger-Muller (GM) tube as a means of detecting the radiation. The GM tube is a hollow cylinder filled with a gas at low pressure. The tube has a ...

under high-energy X-ray excitation. The study, conducted using advanced synchrotron radiation techniques, sheds light on the formation of neutral sulfur atoms during the decay of deep core holes ...