Select the true statement from the following four. Group of answer choices Double-beam instruments are advantageous compared with single-beam instruments because double-beam versions double the absorbance of the measurement, thus improving the detection limit. Single-beam UV-vis spectrometers use one single light source that can be manipulated using optical devices into one or several pathways depending on the instrument's arrangement. Double-beam UV-vis spectrometers use multiple light sources to achieve this effect. When the beam is split using a V-shaped beamsplitter, each beam will be detected by its own photodetector. Using two photodetectors is advantageous because the noise of each detector can easily be tuned to match the other's. Double-beam-in-space uses one light source that is split using a V-shape mirror called beam splitter, therefore you have two beams at the same time. Double-beam-in-time uses a rotating mirror that directly moves the beam from one path to another, therefore you move the beam in space