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Q. Consider the mass spectrometer shown schematically in Figure P19.36. The electric field between the plates of the velocity selector is 950 V/m, and the magnetic fields in both the velocity selector and the deflection chamber have magnitudes of 0.930 T. Calculate the radius of the path in the system for a singly charged ion with mass m = 2.18 × 10-26 kg.

Q. Two narrow slits 41 µm apart are illuminated with light of wavelength 604 nm. What is the angle of the m=3 bright fringe in degrees?

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