A beam of white light passes through a uniform thickness of air. If the intensity of the scattered light in the middle of the green part of the visible spectrum (λ=520nm) is I, find the intensity (in terms of I) of scattered light:
(a) in the middle of the red part of the spectrum (λ=665nm). Express your answer in terms of I.
(b) in the middle of the violet part of the spectrum (λ=420nm). Express your answer in terms of I.