Explain how some low cost UV-Vis spectrophotometers analyze a UV-Vis spectrum in one shot without scanning the excitation wavelength. Group of answer choices A dispersive element decomposes the input light and a movable platform passes the sample right in front of the different colors of light produced. A PMT then measures the scattered light. A double monochromator passes light on to a sample which is then analyzed by a polychromator attached to a CCD camera. A beam of white light is passed through a sample and the output light is passed through a dispersive element that decomposes the transmitted light onto a PDA. A beam of white light is passed through a sample and the output light is passed through a slit that cuts wavelengths and then to a PDA