Light of wavelength 633 nm from a helium-neon laser is incident normally on a plane containing two slits. The first interference maximum is 0.83 m from the central maximum on a very wide screen 11 m away. How many interference maxima can be observed, including the central bright spot? ####Note:: Hi there, would you please solve it real quick, that would be very helpful and appreciated. I will give you a good feedback too. Thank you