3. You are using a fluorescence microscope to research the microstructure of a new material that you synthesized. The sample is sitting on the microscope stage and is in focus when a certain distance from the objective that brings it in the focal plane. You are using a confocal microscope has a focal plane that is rather narrow, about 250 nm. If the stage, the objective, the microscope body and all of the structural parts are machined out of the same composition of brass, will your sample go out of focus if the room heats up by 10C? Explain