(III) Show that the energy of a particle (charge e) in a synchrotron, in the relativistic limit (v * C), is given by E (in eV) = Brcwhere B is the magnetic field and r is the radius of the orbit (SI units).

66. What is the minimum number of slits required in a diﬀraction grating to just resolve light with wavelengths of 471.0nm and 471.6nm A. 99 B. 197 C. 393 D. 786 E. 1179 ans: C 67. X rays are: A. electromagnetic waves B. negatively charged ions C. rapidly moving electrons D. rapidly moving protons E. rapidly moving neutrons ans: A 68. Bragg’s law for x-ray diﬀraction is 2dsinθ = mλ, where θ is the angle between the incident beam and: A. a reﬂecting plane of atoms B. the normal to a reﬂecting plane of atoms C. the scattered beam D. the normal to the scattered beam E. the refracted beam ans: A 69. Bragg’s law for x-ray diﬀraction is 2dsinθ = mλ, where the quantity d is: A. th