Select all the following statements that are true concerning absorption and emission spectra. group of answer choices an emission spectrum is created when a sample of excited gas emits particular frequencies of light. an absorption spectrum is created when a sample of excited gas emits particular frequencies of light. for a particular element, its absorption and emission spectra show the same discrete line patterns. if the energy of the atom is increasing, then there must be an emission of light energy. conversely, if the energy of the atom is decreasing, then there must be an absorption of light energy.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.