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Week 9 Lecture & Reading Discussion_Introduction to General Astronomy

Week 9 Lecture & Reading Discussion_Introduction to General Astronomy

Q Part 1: State what "emission" means in the context of an atom's electronic energy levels, do so by stating what form of energy is involved and what change occurs when this energy is released. Then, describe why all stars produce absorption spectra, despite the fact that their light originates in a hot & dense core. Part 2: Explain why wavelengths of light are compressed/stretched when the object producing the light moves towards/away from you. Relate your explanation to the speed of light, c.

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Part 1 In the realm of atoms, when the electrons are vulnerable and excited, these electrons move up to an energy level that is higher (excited state) than its current levels, and comes back to the initial level (ground state), and during this process, it emits different bright spectral lines of light at different wavelengths as it releases its energy.