Answer:
width of the middle bright spot = 2.6 mm
Explanation:
given data
wide d  = 0.50 mm = 0.50 ×[tex]10^{-3}[/tex] m
wavelength = 650 nm = 650  ×[tex]10^{-9}[/tex] m
wall D = 2 m
to find out
width of the middle bright spot
solution
we know width formula that is
width of the middle bright spot = wavelength ×D / d
put here all these value we get
width of the middle bright spot = wavelength ×D / d
width of the middle bright spot = 650  ×[tex]10^{-9}[/tex]  × 2  / 0.50 ×[tex]10^{-3}[/tex]
width of the middle bright spot = 2.6  ×[tex]10^{-3}[/tex]  m
so width of the middle bright spot = 2.6 mm
