Imagine that you are playing a game of clue in which mrs. white is killed in the conservatory. you have a device in each room to you find the murderer: a spectrometer that detects the entire visible spectrum to indicate who is in that room. for example, if someone wearing yellow is in a room, light at 580 nm is reflected. the suspects are colonel mustard, professor plum, mr. green, mrs. peacock (blue), and miss scarlet. at the time of the murder, the spectrometer in the dining room recorded a reflection at 520 nm. the spectrometersin the lounge and study recorded reflections of higher frequencies, and the one in the library recorded a reflection of the second longest wavelength of the five recorded. who killed mrs. white?