Question

In young's double slit experiment, the fringe width is $12\, mm$ If the entire arrangement is placed in water of refractive index $\frac{4}{3}$, then the fringe width becomes (in $mm$ )

• A. 16
• B. 9
• C. 48
• D. 12

Answer 1

Answer: (B)

9

Answer 2

The correct option is(B): 9.