Atomic absorption and atomic emission spectroscopy each require a flame to atomize samples. which of the following statements explains which technique requires a more stable flame temperature and why? atomic emission, because a small population of the excited state can vary significantly as the flame temperature is changed atomic absorption, because the sample solution must be vaporized and the sample must be atomized very quickly atomic emission, because the emission intensity is proportional to the concentration of element in the sample atomic absorption, because the hollow-cathode lamp requires a particular energy of ne^+ or ar^+ ions to excite fe atoms