Light from a sodium lamp (A= 589 nm) illuminates a narrowslit and is observed on a
Chapter 17, Problem 62(choose chapter or problem)
Light from a sodium lamp (A= 589 nm) illuminates a narrowslit and is observed on a screen 75 cm behind the sli t. Thedistance between the fi rst and third dark fringes is 7.5 mm.What is the width (in mm) of the slit?
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