A single slot of width b is illuminated by a coherent monochromatic light of wavelength
Answer (1)
10th Jan, 2020
Hello,
The answer is 3.0 cm. The solution is as follows,
min.
fsinθ=nλfsinθ=nλ
sinθ=nλ6sinθ=nλ6
n=2n=2
sinθ=2λ6=tanθ1=x1Dsinθ=2λ6=tanθ1=x1D
x=4x=4
sinθ2=4λ6=x2Dsinθ2=4λ6=x2D
x2−x1=4λ6−2λ6=2λ6=2λ6=3cmx2−x1=4λ6−2λ6=2λ6=2λ6=3cm
width of central max =
2λ6=3cm
Hope this helps, Good Luck.
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