QUESTION#3 J. J. Thomson is best known for his discoveries about the nature of cathode rays. Another important contribution of his was the invention, together with one of his students, of the mass spectrometer. The ratio of mass in to (positive) charge q of an ion may be accurately determined in a mass spectrometer. In essence, the spectrometer consists of two regions; one that accelerates the ion through a potential difference I' and a second that measures its radius of curvature in a perpendicular magnetic field as shown in (Figure 1). The ion begins at potential V and is accelerated toward zero potential. When the particle exits the region with the electric field it will have obtained a speed V With what speed u does the lon exit the acceleration region? Find the speed in terms of m. 4. V, and any constants. After being accelerated, the particle enters a uniform magnetic field of strength By and travels in a circle of radius R (determined by observing where it hits on a screen-as shown in the figure). The results of this experiment allow one to find m/q in terms of the experimentally measured quantities such as the particle radius, the magnetic field, and the applied vollage. What is m/q? Express mig in terms of Bo. V. R. and any necessary constants