ASTRO-110 Lecture Notes - Lecture 25: Absorption Spectroscopy, Continuous Spectrum, Secondary Mirror
9 Oct 2020
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Document Summary
Light and matter light can interact with matter in four general ways: Emission: energy comes from electrical potential energy supplied. Placing your hand near an incandescent light bulb, your hand absorbs the light and heats it up. Glass and air transmission: allows light to pass through. Reflection: light bounces in the same general direction. Materials that transmit light are said to be transparent. Materials that absorb light are called opaque. Spectra comes in three basic types: wavelengths without interruption. Continuous spectrum: traditional or incandescent which spans a broad range of. Emission line spectrum: thin or low density cloud of gas emits light only at. Absorption line spectrum: a cloud of gas lies between us and a light bulb, the specific wavelengths cloud absorbs light of specific wavelengths. Each spectrum is shown both as a band of light and a graph. The graph shows the amount, or intensity, of the light at each wavelength.
