A grating with 5550 slits/cm has red light of 0.680 m incident on it. The light shines

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A grating with 5550 slits/cm has red light of 0.680 μm incident on it. The light shines through the grating onto a screen that is 5.50 m away.

(a) What is the distance between adjacent slits on the grating? 

(b) How far from the central bright spot is the first-order maximum on the screen? 

(c) How far from the central bright spot is the secondorder maximum on the screen? 

(d) Can you assume in this problem that sin θ ≈ tan θ? Why or why not?

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