vacate order. Adopted Rules: Closed to Comments. The New York City Environmental Control Board (âECBâ) has modified the ECB Buildings Penalty Schedule to reflect the 2014 updates to the NYC Construction Codes and to more clearly and effectively allow the New York City Department of Buildings (âDOBâ) to enforce particular sections of law.
spectrum-an ordered array of the components of an emission or wave. spectrum line-an isolated component of a spectrum formed by radiation at a uniform frequency. array-an orderly arrangement; an array of troops in battle order. absorption spectrum-the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths.
A star is a hot dense ball of gas so we should expect it have a continuous spectrum. But stars also have thin, transparent outer layers that light has to pass through. These layers produce absorption lines. Thus the light from the sun and stars are examples of absorption spectra.The stars' spectra differ from each other depending on temperature and composition. When astronomers first observed these differences in the 19 th century they devised a classification system that assigned letters to various spectral types.he lines occur where atoms of the gas have absorbed specific wavelengths of light. Hence we call this type of spectrum an absorption spectrum. If we view this transparent gas against a black background we would see that it also emits light (if it has an enough energy), giving an emission spectrum.