A fringe width of a certain interference pattern is β=0.002 cm. What is the distance

A fringe width of a certain interference pattern is β=0.002 cm. What is the distance of 5th dark fringe centre?

Options

(a) 1×10⁻² cm
(b) 11×10⁻² cm
(c) 1.1×10⁻² cm
(d) 3.28×10⁶ cm

Correct Answer:

1.1×10⁻² cm

Explanation:

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