Question: 7. Il Light from a sodium lamp ( = 589 nm) illuminates two nar- row slits. The fringe spacing on a screen 150 cm behind

7. Il Light from a sodium lamp ( = 589 nm) illuminates two nar- row slits. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm. What is the spacing (in mm) between the two slits? 8. A double-slit interference pattern is created by two narrow 20 800 N absorb What wave a T The

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