In a Young's double-slit experiment with microwaves of wavelength 3.20 cm, the distance between the slits is 5.40 cm and the distance between the slits and the screen is 140.0 cm. Determine the number of bright fringes on the screen. Assume the screen is long enough to at least show the first order bright fringes.

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?