posted by ceci
orange light (lambda=630nm) hits diffraction grating which has a line spacing of (mu)m. The interference pattern is seen on a screen that is 4.0m away.
what is the distance between the central bright spot and the first order bright spot on the screen.
(sorry I don't have symbols on my computer)
λ= 630•10⁻⁹ m,
d= ? μm = ? •10⁻⁶ m
d•sin φ =k•λ
tan φ= x/L