We are used to seeing spectacular astronomical images in the press and on the internet. This course gives an in-depth introduction to two of the most important instruments used to create these images and explore the science behind them – telescopes and spectographs.

This course is drawn from the preparatory work for the practical residential school at the Observatori Astronomic de Mallorca. The course image shows a student at work in one of the telescope domes at the Observatori.

Geometric optics is the part of Physics responsible for the study of light and the phenomena associated with it, considering that its propagation occurs through light rays.

So it is with astronomy and its elliptical orbits and with mechanics and its vectors. It is also so in the study of the properties and behaviors of light, in the field of physics that we call geometric optics.

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explanation:

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.