Art a what is the wavelength of light that is deviated in the first order through an angle of 12.7 ∘ by a transmission grating having 5000 slits/cm? assume normal incidence. λλ = nothing m request answer part b what is the second-order deviation of this wavelength? assume normal incidence. θθ = nothing ∘ request answer provide feedback

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?