Answer:
the spacing (in mm) between the two slits = 0.221mm
Explanation:
The steps and appropriate formula is as shown in the attachment.
The spacing between the two slits is 0.221mm.
The spacing between the two slits is given as,
[tex]D=\frac{\lambda L}{y}[/tex]
Where [tex]\lambda[/tex] is wavelength, y is fringe spacing and L is length of screen.
Given that, [tex]\lambda=589nm,L=150cm,y=4mm[/tex]
Substitute in above equation.
[tex]D=\frac{589*10^{-9}*150*10^{-2} }{4*10^{-3} }\\ \\D=2.21*10^{-4} m\\\\D=0.221mm[/tex]
Hence, the spacing between the two slits is 0.221mm.
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