Two Slits of Width a and Separation D Are Illuminated $\lambda$

question 31

Multiple Choice

Two slits of width a and separation d are illuminated by a beam of light of wavelength $\lambda$ .The separation of the interference fringes on a screen a distance D away is:

• A)"\(\lambda\)a/D"
• B)"\(\lambda\)d/D"
• C)"\(\lambda\)D/d"
• D)"dD/\(\lambda\)"
• E)"\(\lambda\)D/a"

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