The Centers of Two Slits of Width a Are a Distance

question 39

Multiple Choice

The centers of two slits of width a are a distance d apart. If the fourth minimum of the interference pattern occurs at the location of the first minimum of the diffraction pattern for light of wavelength λ, the ratio a/d is equal to

• A)0.
• B) .
• C) .
• D) .
• E) .

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